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

Gigantic unfinished stupa and the world's 2nd largest bell.

A grand imperial capital left to fall into magnificent ruin.

Over 2,000 ancient temples dot the Myanmar landscape at the site of this famed archaeological site.

A gargantuan crystal kingdom.

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

Extraordinary sculpture garden created by an eccentric English poet.

These azure waters were thought to lead to the Mayan Underworld.

An Aztec snake god has taken the material form of an apartment complex.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

On rare days, this abandoned castle's gatekeepers open its doors, revealing the eye-popping splendor hidden inside.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Did Gustav Eiffel design this enigmatic metal building?

Land that belongs to no nation.

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

The most remote tree in the world survived desertification, but not a drunk truck driver.

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

One of the most spectacular canyons in the world.

Mosaics, storks, and brothels—this ancient city has it all.

Buildings from the fictional planet of Tatooine still litter the Tunisian desert.

The best-preserved Roman small town in North Africa.

A beautiful oasis town dating back to the Roman period still serves as reprieve from the brutal summer sun in Libya.