Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

A museum founded to reflect on and remember the human rights abuses under Chilean dictator Augusto Pinochet.

A memorial to the victims of Argentina's "Dirty War."

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

Located in the mountains of Nicaragua, one man has spent most of life beautifying a massive cliff by hand.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

This panoramic lift provides a futuristic ride up San Pedro Mountain.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

An unexpected homage to 90s celebrities hidden in a corner of Ibiza.

Semi-mystical manmade towers of rocks decorate this rocky seaside.

Secret refuge and museum of the Duke of Florence.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

The secret medieval communication system will whisk your words above the noise of the crowd.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

The Sun King's military models, saved from the Louvre.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Meet the bronze beloved pet to a family of famous peeing statues.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

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

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.