A neo-Gothic castle in the Argentinian countryside.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Museum housed in underground tunnels that date back to Buenos Aires's earliest settlements.

An underwater restaurant, surrounded by a coral reef.

This deceptively salty lake looks like blushing pink lemonade.

A city built from mud and known as the "Manhattan of the desert."

The most alien-looking place on Earth.

One of the world's southernmost bars.

The best place to send your postcards home from Antarctica.

An abandoned whaling station on an active volcano offers hot springs in Antarctica, surrounded by ruined giants of industry.

The world's largest bioluminescent area was undiscovered by science until 2005.

Russian Orthodox church built on an Antarctic island.

Ancient Manuscripts showcase the civilization of West Africans during the Middle Ages.

These Nubian pyramids are strange and unique, even by pyramid standards.

These homes carved into the mountains seem to defy the laws of nature.

Massive stele returned to Ethiopia after 70 years in Rome.

The world's most remote memorial to the victims of the UTA Flight 772 disaster.

An ocean in the making, in the Ethiopian desert.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

A newspaper editor turned this abandoned island into a tortoise nature preserve that's now the world's smallest national park.

Kenyan restaurant is a carnivore's paradise, serving exotic meats at its ultimate 'Beast of a Feast.'

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

Human ancestor’s 3.6 million year-old footprints.

Mount Nyiragongo has erupted at least 34 times since 1882 and is home to the world's largest lava lake.