A retro Yugoslav congress, cultural, and business hall built in the 1970s, with an iconic world clock.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

The monastery survived the Communist revolution in Mongolia as a religious museum.

Have tea in a cemetery with a dazzling view of Istanbul.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

One of the best-preserved medieval streets in Europe.

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

An aptly-named street near the birthplace of the modern LGBT rights movement.

Different sections of the Zemun Fortress were built in the 14th and 15th century as a response to the advance of the Ottoman Empire.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

More than 10,000 small mirrors cover the curved surface of the world's second-largest solar oven, located in a remote village in Uzbekistan.

The Paul Bunyan of the steel industry.

A completely underground tour following the path of the most precious element: water.

A museum dedicated to secret surveillance.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

This theater opened in 1998, but both the building and the puppeteers who perform there have a distinguished history.

An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

A fortified palace in the shape of a ship on the Thiou river.

One of the most historical literary characters continues to stroll his hometown.

This elevator was built in 1907 to connect two neighborhoods separated by a steep, rocky cliff.

An homage to Jackie Gleason's bus-driving character from 'The Honeymooners.'

A touching tribute to the "Queen of Soul."

This famous writer's tombstone is a literary pilgrimage site that was publicly defiled by a rival.