This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

A Bibliophile's Dream.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This huge metal monument is slowly being stripped to its concrete skeleton.

A grand Yugoslav memorial to the group of partisans who fought and died resisting western Serbia’s Nazi occupation.

This brutalist monument is inscribed with 9921 names of Yugoslav partisans who perished during WWII.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

These warring psychedelic crags commemorate an unsuccessful military operation.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

The most visited, and possibly most controversial, museum in Germany.

A hand-built folk art installation covered with messages of God's love.

Experience park where visitors are told to expect the unexpected.

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

Serving you alcohol with a side of insanity. Also, costumes!

A Japanese corporation has turned this small island town into living modern art gallery.

A massive Montreal stadium that has seen nothing but trouble since its inception.

America's most famous piece of self-built architecture.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.