Sunrise over thermal pools in Yellowstone.

Cave pool, Santorini, Greece

Zion National Park, Utah

Pomerania, Poland

Plitvice, Croatia

Alberobello, Italy

Onondaga Cave, Missouri

Kabardino-Balkaria Alpine Reserve, Russia

McKay Falls on California's Coast

Frasier Lake, Bozeman Montana

Mountains across a meadow in Stowe, VT.

Cappadocia, Turkey

Ice Caves of Kamchatka, Russia