The gutted remains of this Estonian mansion are a monument to a tragic love.

Open-air museum with a large collection of Soviet-era statues.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

Flamboyant architecture from the turn of 20th century.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

Marvel at this massive waterspout fueled by the incoming tide.

These wooden balconies that are both decorative and functional.

This mountaintop observatory is home to one of the world's largest reflective telescopes.

Founded in 670, this ancient mosque is an architectural time portal.

The best-preserved Roman small town in North Africa.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

The last remaining site of Yoruba worship of the fertility goddess.

Peace Park and the Atomic Bomb Dome.

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

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

A little sculpture with a large wardrobe.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

This Greek temple, open only an hour a day, was the site of a war of tastes between an architect and an artist.

Only museum in the world devoted to bookbinding and book arts holds a permanent collection representing five centuries.

A fascinating and enormous collection of natural history exhibits stained by a dark colonial legacy.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

A giant bug impaled on a 75-foot-tall needle.