After 11 years of reconstruction work, Slovakia's finest hilltop chapel complex is finally reopen to the public.

An underground city of salt.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Protecting the dead from opportunistic body snatchers.

The most loyal of little dogs, or a Victorian era publicity stunt?

A sweet symbol marks the place where torturous executions were once carried out.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

A 18th century graveyard and its astonishing cortege of macabre iconography.

A replica of the Liberty Bell rang daily from West Berlin's City Hall throughout the Cold War.

Floating swimming pool within a moored vessel.

Where once there was a train station bathroom, there is now this German burger joint.

An old department store turned Nazi prison turned artist commune.

Cold war icon and onetime "hole" in the iron curtain.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

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

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.