The ancient tomb acts as a calendar that keeps perfect time.

An accidentally hidden library containing the ephemeral history of New York.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Hear the tales of New York's most notorious criminals.

Lie in a hammock where George Washington stood.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Copenhagen's celebrated theme park and gardens.

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

This natural crater along the coast of Jersey may take its name from the devil statues who have watched over it.

A passage grave used in neolithic rituals.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

The silly symbol for an underground protest group is now scattered around the city.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Macabre astrological automaton clock dating to the late 1400s.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

A contemporary art installation housed within a Gothic cathedral.

The site of Austria's biggest concentration camp now honors its victims.

Op-art architecture designed for happiness.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.