No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Frida Kahlo's childhood home, now a museum of her life and works.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The place of worship erected not once, but three times in one of the most desolate places on Earth.

A wooden hut from the Heroic Age of Antarctic Exploration.

Nimrod Polar Expedition base, and home to hundred-year-old frozen whisky.

Antarctica's bustling metropolis, originally established by Richard E. Byrd.

Fire meets ice at the southernmost volcano on Earth.

This giant statue is the product of a mixture of corruption, Stalinist architecture, and North Korean manpower.

A network of ancient Egyptian tombs built into the cliff face along the Nile.

Slum Settlement Filled With Mountains of Garbage.

Charnel house at the foot of Mount Sinai.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

Ozymandias’ time-keeping temple.

The world's largest church atop a political fault line.

An enormous public square and parade ground built to celebrate Ghana's independence.

Where thousands of slaves passed through the "Door of No Return."

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

Nobles would stage mock naval battles on this large lake at the Royal Palace of Caserta.

This Roman amphitheatre was also the location of the first gladiator school.

Tourists to the mountaintop Sicilian town often overlook its ancient fortifications.

Built on a medieval synagogue, this church has a burial crypt, tunnel system, and Jewish ritual bath hiding deep underneath.