This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.

A tiny village in Wales claims the name of a noble medieval hound slain for a crime he didn't commit.

Crammed inside this grounded passenger plane is a bar that was once a Communist hang out and is now a ratty relic.

Tiny communists hammer away on the Olomouc Astronomical Clock.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

Be(w)ar(e) the moat around this historic Czech castle.

The oldest garden in Prague, once part of an medieval orchard.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A mocking tribute to the past and modern leadership of Prague.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Macabre astrological automaton clock dating to the late 1400s.

A church of bones, decorated with 40,000 human skeletons.

Real bones which are said to have belonged to a Polish dragon.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

People in Poland have rallied to save this unnatural desert from being reclaimed by the forest.

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Gliwice Radio Tower, likely the tallest wooden structure in the world.

A remote hilltop covered in giant monoliths haunts the Brittany countryside.

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