A collection cataloguing one of the most brutal dictatorships in modern history.

Renowned restaurant tucked in a cave once occupied by buccaneers.

A remarkable range of flora and fauna are represented in this Dominican nature preserve.

The oldest colonial fortress in the Americas was once the home and later prison of Christopher Columbus.

After Christopher Columbus died, his son built a fancy house to rule from.

Switzerland's oldest public observatory is an important part of the Zurich cityscape.

Hidden in the garden of physicist Erwin Schrödinger's house is a life-size figure of a cat from his famous thought experiment.

The final resting place for a wealthy Roman family, this tomb might be the best preserved of its kind outside Italy.

This small chapel built into rock is the oldest place of worship in Luxembourg.

Lavish royal estate punctuated with heated greenhouses.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

Still standing despite its considerable slant, this tilted lighthouse has become a local symbol of resilience.

Few of the many visitors to this resort town know of its hidden Maya ruins.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

Gold Rush-era tombstones line the park's paths.

An island graveyard with spectacular views of the Caribbean.

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

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

This massive, ancient stone was disassembled and then put back together again.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.