Lake Natron, Tanzania
Microorganisms that thrive on salt flock to this lake, producing a red pigment which colorizes the water. The lake contains so much salt that if other animals took a dip in the water they would calcify, essentially turning to stone.
Underwater Waterfall, Mauritius Island
Yep, that's a waterfall under the ocean's surface. Strong currents force sand from the shores of Mauritius into the chasm.
This actually isn't a surrealist painting — it's the "dead valley." Here, the trees stand against the highest sand dunes in the world.
Antelope Canyon, Arizona, United States
Zhangye Danxia Landform, Gansu, China
24 million years' worth of mineral deposits in these red sandstone formations create the colorful landscape. Rain and wind chipped away at it, forming the spectacular shapes.
Reed Flute Caves, China
The breathtaking stalactites, stalagmites and pillars were created through water erosion beautifully decorating this 240-meter-long cave.
Lake Hillier, Australia
Algae and bacteria produce the pink dye that decorates this lake. Although very bright, the water is safe for wildlife and humans.
Caño Cristales River, Colombia
Dubbed "the most beautiful river in the world," the extremely varied flora and fauna color the body of water red, yellow, green and black.
Sentinels of the Arctic, Finland
These magnificent ice sculptures are actually trees covered in ice. The temperature here can fall below -40 degrees Fahrenheit.
Underwater River, Cenote Angelita, Mexico
Beneath the water of Cenote Angelita lies another body of water — a flowing river. Because the river's water is filled with hydrogen sulfate (a heavier substance than salt water), the water sinks to the bottom, creating an underwater river.
An amazing trip to South Africa, where we got up close and personal with giants both wild and gentle
From an underwater waterfall in Mauritius Island to the isolated highlands in Iceland, these destinations will blow your mind
From a 15-cent burger to a dance craze that even caught on with little kids, here's the world we left behind about a half-century ago
15 iconic lunch boxes from the '50s and '60s
A road trip through Pennsylvania to Frank Lloyd Wright's masterpiece Fallingwater
A look at what developed many years later after these fascinating subjects were first photographed