A 19th-century fortress and collection of artifacts offer a tour of Saudi history.

A modern tower, symbolizing the legend of a golden egg on top of the tree of life.

A theater with world-class acoustics, neo-Classical architecture and Kazakh ornaments.

Steadily reminding Czechia of its past.

Monument to a suicide protesting the Soviet invasion.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Macabre astrological automaton clock dating to the late 1400s.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

Hundreds of dwarf beeches create an unusual, haunting forest in the north of France.

A neo-gothic statue modeled on German Emperor Kaiser Wilhelm II, which had its distinctive mustache shaved off by Nazis in World War II.

The last bastion of Roman presence north of the Alps looms over a German town.

A rare cold-water geyser that bubbles to life every half hour.

This German art chapel is perfect for those who like their worship hard, modern, and utterly alien.

This virtually windowless mass of smooth concrete is the only Catholic church in the city.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

A climbing route in the mountains of Italy’s Dolomites, built for soldiers during World War I.

The largest flower auction house in the world.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

The hallucinogenic center of the ancient world.

Legend says this sacred tree was a gift from goddess Athena.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

The site where hundreds of Greeks were tortured by the Nazi secret police is now a cosmetics store.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

The first mosque in the world to receive electricity.