Dale Bottom from Castlerigg Stone Circle, Keswick, Lake District National Park, Cumbria, England, United Kingdom, Europe

Methane clathrate gas released from bottom sediments of Lake Baikal, Irkutsk Oblast, Siberia, Russia, Eurasia

Matterdale Common, near Dale Bottom, Lake District National Park, Cumbria, England, United Kingdom, Europe

Man fishing in front of Mount Baru Jari, Segara Anak Lake at the bottom of Mount Rinjani volcano crater, Lombok, Indonesia, Southeast Asia, Asia

Matterdale Common, near Dale Bottom, Lake District National Park, Cumbria, England, United Kingdom, Europe

A large petroglyph covered boulder in dry Stillman Lake at the bottom of the Verde River Canyon in Paulden, Arizona, United States of America, North America

Lake in Rocky Mountains near Banff, with avalanche damage visible in bottom half of picture, Alberta, Canada, North America

The summer Milky Way overhead and through the Summer Triangle stars in July, looking up through trees in Banff National Park at Herbert Lake. Deneb is at top left, Vega at top right, and Altair is at bottom. The bright Cygnus star cloud is obvious. As are the dark lanes in the Milky Way, including the Funnel Nebula at top, aka Le Gentil 3.

Leaf floating on water surface, bottom of lake with stones, Markelfingen, Lake Constance, Baden-Wuerttemberg, Germany, Europe

Man standing at cracked earth at the bottom dried up lake, Poland, Europe

Mountain lake, Christlessee, clouds of mist drift over the clear turquoise water, tree trunks at the bottom of the lake, Trettachtal, Allgaeu Alps, Allgaeu, Bavaria, Germany, Europe

Leaf floating on water surface, bottom of lake with stones, sunset, Markelfingen, Lake Constance, Baden-Wuerttemberg, Germany, Europe

Female pike-perch (Sander lucioperca) guarding clutch in nest on lake bottom, quarry pond with fresh water, Germany, Europe

Mountain lake, Christlessee with clear turquoise water, tree trunks at the bottom of the lake, Trettachtal, Allgaeu Alps, Allgaeu, Bavaria, Germany, Europe

Mountain lake, Christlessee with clear turquoise water, tree trunks at the bottom of the lake, Trettachtal, Allgaeu Alps, Allgaeu, Bavaria, Germany, Europe

Mountain lake, Christlessee with clear turquoise water, tree trunks at the bottom of the lake, Trettachtal, Allgaeu Alps, Allgaeu, Bavaria, Germany, Europe

Lost Lake at sunset, Chugach National Forest, Kenai Peninsula, South-central Alaska in summertime; Seward, Alaska, United States of America

Water Abstract 23, Massachusetts, Seekonk, Caratunk Wildlife Refuge, Ripples and reflections on water surface.

Water Abstract 18, Massachusetts, Seekonk, Caratunk Wildlife Refuge, Ripples and reflections on water surface.