This remote research station sits amid the second-largest ice sheet on the planet.

An experimental forest at the foreground of arboreal science is also the canary in the coal mine for climate change.

The world's northernmost flowers cling tenuously to life on desolate Kaffeklubben Island.

A surprisingly beautiful abandoned World War II military base in East Greenland.

This Japanese-inspired labyrinth of hot springs is hidden in a Chilean forest.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

The most southern point you can drive to in the Western Hemisphere.

Stenciled handprints and wall paintings dating back 10,000 years, some of the earliest forms of cave art.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

This stunning mass of ice spans 121 square miles and is still growing.

The red crab exhibits one of the most spectacular migrations on earth, despite manmade obstacles.

Is there such thing as too many fruit bats? Not anymore.

A collaboration of art and ornithology mourns the calls of Sydney's lost birds.

The unique ecosystem atop an Australian mountain is home to some colorful inhabitants.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

The best place to encounter plants and animals that can only be found in New Caledonia.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A perfectly preserved hill village where the buildings are painted like white lace.

Bridge that died in war and was resurected.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

At this 16th-century monastery in rural Bulgaria, visitors can also spend the night.

A naturally beautiful, seemingly bottomless deep blue spring.