Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

Where the lovelorn find a home for their sentimental keepsakes.

A museum dedicated to one of Portugal's most celebrated writers.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

Acres of salt crystal pyramids dry in the sun along Thailand's "salt road."

This legendary city has been a tourist attraction for centuries.

Castro's communist ice cream mothership has been serving five-scoop "salads" for over 50 years.

A marvel of Byzantine engineering under the streets of Istanbul.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Climb inside an iron crystal magnified 165 billion times its normal size.

An ancient capital city that dates back 3,000 years and harbors many surprises.

A more chill but no less fascinating version of the famous ancient archeological site.

A ring of soy sauce bottle bases decorate an important Singaporean landmark.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

Climb to the top of the world's largest seated bronze Buddha.

Ozymandias’ time-keeping temple.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

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

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.