 | 1848-06. Underground river Poneretka emerging from a cave and meeting whitewater area of Msta River near Borovichi. Novgorod Region, Russia, July 3, 2016Similar picturesSmall thumbnails | Use large thumbnails | View as slideshow |
| 1848-06. Underground river Poneretka emerging from a cave and meeting whitewater area of Msta River near Borovichi. Novgorod Region, Russia, July 3, 2016Similar picturesSmall thumbnails | Use large thumbnails | View as slideshow |
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