 Sand ripples on a beach near Sestroretsk, a suburb of Saint Petersburg. Russia, May 19, 2011
 Intricate patterns in the sand that are wave-formed ripples (also known as oscillation ripples), which provide a frozen snapshot of the water s movement just before the tide or water level receded. They are formed by the back-and-forth oscillatory motion of water particles at the bottom of shallow waves. As a wave passes, water moves sand grains forward and then backward, piling them into these neat, parallel ridges. The crests (ridges) of the ripples run parallel to the shoreline, which is typical for wave-formed ripples as they align perpendicular to the direction of wave propagation. The preservation of such sharp ripple crests indicates the water receded gently, likely during a calm period after the windier conditions that initially formed them. Sestroretsk near Saint Petersburg, Russia, October 9, 2025
 Blooming anemones (Anemone nemorosa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Wood sorrel (Oxalis acetosella, Russian name Kislitsa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Common dandelion (Taraxacum officinale, Russian name Oduvanchik) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Yellow flowers of Gagea minima (Russian name Gusiny Luk) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Lesser celandine (Ficaria verna, Russian name Chistyak) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Flower of wood sorrel (Oxalis acetosella, Russian name Kislitsa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Close up of Lesser celandine (Ficaria verna, Russian name Chistyak) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Sand ripples at sunrise in Solnechnoe, near Saint Petersburg. Russia, May 17, 2021
 Ripples on wet sand in Solnechnoe, west from Saint Petersburg. Russia, May 20, 2019
 Sand ripples east of Solnechnoe, near Saint Petersburg. Russia, May 12, 2016
 Sand ripples on a beach in Solnechnoe, near Saint Petersburg. Russia, May 17, 2021
 Young leaves of Lily-of-the-valley (Convallaria majalis, Russian name Landysh) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Emerging leaves of Lily-of-the-valley (Convallaria majalis, Russian name Landysh) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Sand ripples on a beach. Kurort, west from Saint Petersburg, Russia, May 31, 2014
 Sand ripples on a beach east of Solnechnoe, near Saint Petersburg. Russia, May 12, 2016
 Sand ripples on a beach in Solnechnoe, west from Saint Petersburg. Russia, May 20, 2019
 Wood anemones (Anemone nemorosa, Russian name Vetrenitsa Dubravnaya) carpeting forest in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Sand ripples on a beach of Gulf of Finland in Solnechnoe, near Saint Petersburg. Russia, May 17, 2021
 Texture of sand ripples on a beach east of Solnechnoe, near Saint Petersburg. Russia, May 12, 2016
 Back lit anemone flower (Anemone nemorosa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Yellow anemone flower (Anemone ranunculoides) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Close up of anemone flower (Anemone nemorosa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Two wood anemone flowers (Anemone nemorosa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 White anemone flower (Anemone nemorosa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 19, 2011
 Sand ripples on Laskovyi Beach in Solnechnoe, west from Saint Petersburg. Russia, August 7, 2024
 Sand ripples at low tide on Laskovyi Beach in Solnechnoe, west from Saint Petersburg. Russia, August 7, 2024
 Sand ripples covered by iron oxide film on a beach. Kurort, west from Saint Petersburg, Russia, May 31, 2014
 Expansive view looking north-northwest from the southern end of the Sestroretsk coastline towards the Sestroretsk Resort (Kurort) and, further in the distance, the settlement of Solnechnoe (Sunny). The coastline curves gently inward. This specific geography near Sestroretsk causes the eastward littoral drift (sand movement) to weaken, resulting in a very wide, accretional beach (up to 140 meters wide) known for its fine sand and extensive dunes. The foreground shows a sandy spit or sandbar created by the outflow of water. The shallow water here creates the wide, calm pools seen in the foreground, which are popular with birds. Sestroretsk near Saint Petersburg, Russia, October 9, 2025
 Oak alley in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Oak alley towards the gulf in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Grey seal washed up on a beach near Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Sand ripples and sand mounds at sunrise near Sealine Beach Resort near Mesaieed, view to north-west. Southern Qatar, July 10, 2015
 A wooden house at 64 Kommunarov Street in Sestroretsk, suburb of Saint Petersburg. Russia, July 27, 2005
 Morning glory (Ipomoea) on a beach near Sestroretsk, west from Saint Petersburg. Russia, June 30, 2011
 Accumulation of melting ice with sand in Gulf of Finland near Dubki Park in Sestroretsk, west from Saint Petersburg. Russia, April 11, 2017
 Wavy pattern of sand ripples and sand mounds with plants of Seidlitzia rosmarinus at sunrise near Sealine Beach Resort near Mesaieed. Southern Qatar, December 11, 2015
 Opening flowers of lungwort (Pulmonaria)(?) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Violet (viola) in a roadside ditch in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Flower buds of lungwort (Pulmonaria)(?) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Sand ryegrass (Leymus arenarius, Russian name Volosnets peschany) in Tarkhovka near Sestroretsk. West from Saint Petersburg, Russia, August 15, 2017
 Seabeach sandwort (Honckenya peploides) in sand behind reeds on a beach in Sestroretsk, north-west from Saint Petersburg. Russia, July 8, 2016
 Blooming seabeach sandwort (Honckenya peploides) in sand behind reeds on a beach in Sestroretsk, north-west from Saint Petersburg. Russia, July 8, 2016
 Lesser celandine (Ficaria verna, Russian name Chistyak) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Wood sorrel (Oxalis acetosella, Russian name Kislitsa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Yellow Toadflax (Linaria vulgaris, Russian name Lnanka) on a beach near Sestroretsk, west from Saint Petersburg. Russia, June 30, 2011
 Colony of plants of seabeach sandwort (Honckenya peploides) in sand behind reeds on a beach in Sestroretsk, north-west from Saint Petersburg. Russia, July 8, 2016
 Flowers buds of Greater celandine (tetterwort, Chelidonium majus) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Blooming wood sorrel (Oxalis acetosella, Russian name Kislitsa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Blooming lesser celandine (Ficaria verna, Russian name Chistyak) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Flower of lesser celandine (Ficaria verna, Russian name Chistyak) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Two flowers of lesser celandine (Ficaria verna, Russian name Chistyak) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Flowers of lesser celandine (Ficaria verna, Russian name Chistyak) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Close up of a flower of lesser celandine (Ficaria verna, Russian name Chistyak) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Yellow flower of lesser celandine (Ficaria verna, Russian name Chistyak) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Back lit flower of lesser celandine (Ficaria verna, Russian name Chistyak) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Moneywort (Creeping Jenny, Lysimachia nummularia, Russian name Verbeynik) in Dubki Park in Sestroretsk, west from Saint Petersburg. Russia, June 30, 2011
 Yellow anemone (Anemone ranunculoides) near Sestroretsk, west from Saint Petersburg. Russia, June 30, 2011
 Wood anemone (Anemone nemorosa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Flower of wood anemone (Anemone nemorosa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Yellow flowers of anemone (Anemone ranunculoides) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Yellow flower of lesser celandine (Ficaria verna, Russian name Chistyak) in a roadside ditch in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 A swamp near Sestroretsk, near Razliv Lake, in Sestroretsk area west from Saint Petersburg. Russia, October 2, 2017
 Back lit flower of wood anemone (Anemone nemorosa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 White flower of wood anemone (Anemone nemorosa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Flowers of wood anemone (Anemone nemorosa) carpeting forest in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Back side of a flower of wood anemone (Anemone nemorosa) in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Close up of a flower of wood anemone (Anemone nemorosa) carpeting forest in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 White flower of wood anemone (Anemone nemorosa) carpeting forest in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Back lit white flower of wood anemone (Anemone nemorosa) carpeting forest in Dubki Park. Sestroretsk, a suburb of Saint Petersburg, Russia, May 20, 2015
 Amphitheater in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
 Moth in Lisiy Nos, a suburb of Saint Petersburg. Russia, June 9, 2011
 Alley in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
 Greenery in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
 Sand ripples on a beach in Ship Island. Mississippi, October 29, 2006
 Sand ripples on a beach in Marouna. Northern Qatar, December 19, 2014
 Vokzalny Pond of the park in Pavlovsk, suburb of Saint Petersburg. Russia, May 15, 2011
 Sylvia Gates in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
 Ruins of amphitheater in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
 Birch House in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
 Horsetail (Equisetum) in Pavlovsk Park, suburb of Saint Petersburg. Russia, May 15, 2011
 Stone sphinxes in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
 Viskontiev Pond in Pavlovsk Park, suburb of Saint Petersburg. Russia, May 15, 2011
 Birch forest in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
 Friendship Temple in Pavlovsk Park, suburb of Saint Petersburg. Russia, May 15, 2011
 Sand ripples in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, May 20, 2016
 Sand ripples on a beach in Abu Samra, near the border. Southern Qatar, November 29, 2014
 Sprucecone cap mushroom (Strobilurus esculentus) found in sand in Pavlovsk, suburb of Saint Petersburg. Russia, April 6, 2017
 Spring near Serebryanoe Lake in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
 Forest near Serebryanoe Lake in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
 A hall of Pavlovsky Palace. Pavlovsk, a suburb of Saint Petersburg, Russia, June 14, 2011
 Public sculptures on Laskovy Beach in Solnechnoe, a suburb of Saint Petersburg. Russia, May 19, 2011
 Laskovy Beach and Gulf of Finland in Solnechnoe, a suburb of Saint Petersburg. Russia, May 19, 2011
 Trail in a birch forest in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
 Birches near Slavyanka River in Pavlovsk Park, suburb of Saint Petersburg. Russia, May 15, 2011
 Friendship Temple building in Pavlovsk Park, suburb of Saint Petersburg. Russia, May 15, 2011
 Pack of stray dogs in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
 Sculpture in Pavlovsky Palace. Pavlovsk, a suburb of Saint Petersburg, Russia, June 14, 2011
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