A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The ruins of a pre-Columbian fortress city so secure it held off the Spanish conquistadors for over 20 years.

A display of hand-built replicas of the legendary vessels used by Patagonian and Antarctic explorers.

Spanish religion mixed with local architecture has yielded a network of churches unlike any other.

What was once a unique system of urban elevators is turning into a mechanical ruin.

Pivotal home of Nobel Prize winner Pablo Neruda.

Pablo Neruda's custom-built lover's nest was made to remind him of the sea and named after his mistress' hair.

It's just another skyscraper, but it's shaped like '90s cell phone.

The site of detentions and torture under the Pinochet regime in Chile is now a memorial.

"The country that ate itself."

In the Middle Ages, villagers would sound this stone trumpet to boost fertility and coax fish to shore.

This was once the center of the Birdman cult, and is now a World Heritage Site.

A volcanic crater that visitors can look inside.

The largest stone moai on Rapa Nui.

This large round boulder is said to emit spiritual power, but it may just be magnets.

The world's most remote airport.

This sculpture meant to honor the bravery of the Indigenous Mapuche people of Chile proved controversial.

One of Philadelphia's largest murals resides hidden under this bridge.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.

This grandiose staircase was part of the revival of a medieval Spanish architectural style combining Christian and Islamic influences.