Incredible places: A window onto extraordinary landscapes on Earth

A 77-square-mile seagrass meadow at the bottom of Shark Bay in Western Australia is both Earth's largest plant and largest clone.

Geologists set Turkmenistan's Darvaza gas crater ablaze in 1971, thinking the fire would die down within a few weeks, but the pit is still burning 53 years later.

This stagnant brine pool at the bottom of the Gulf of Mexico is so toxic it kills and embalms any crabs and amphipods that are unlucky enough to stumble into it.

Iron-rich waters buried beneath Taylor Glacier in East Antarctica are sporadically released in what looks like a bloody mess — but the so-called Blood Falls aren't as gruesome as they first appear and sound.

The Eye of the Sahara, also known as the Richat structure, stands out like an oversized ammonite among the sand dunes of the Sahara desert in Mauritania.

China's southwestern karst landscape is pockmarked with dozens of enormous sinkholes that look like they were made with a cookie cutter — and scientists keep finding new ones.

Snake Island was isolated from the Brazilian mainland at the end of the last ice age, trapping Earth's only known population of highly venomous golden lancehead pit vipers on a rock in the Atlantic.

Turkey's magical "fairy chimneys" in Cappadocia were carved out of an ancient volcanic landscape over millions of years before humans turned them into hiding dens.

The Cave of Crystals in Chihuahua, Mexico, is buried almost 1,000 feet (300 meters) beneath Earth's surface and contains giant gypsum crystal beams that are up to 37 feet (11 m) long.