These are probably the most beautifully-crafted toilets you've ever seen.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

This 19th century cyclorama acts like an analogue time machine to a different era.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

This "mathematical tower" was an observatory, early skyscraper, and place to reflect on all of nature and the cosmos.

"World machine" built by an untrained Austrian farmer.

Hungarian self-built castle.

This beautiful 14th-century castle perched on a promontory overlooks the Bay of Trieste.

One of the largest caves in the world open to the public.

These pools have been abandoned for over 20 years.

An otherworldly alpine pasture with its own unique microculture that recalls Middle Earth.

A beautiful drive through the foot of the Alps traces the path of 15th-century Turkish raids.

This abandoned Slovenian military barracks has become a punky-political art squat.

This former railway facility is the oldest in Slovenia, and now houses a museum showcasing the history of steam locomotives.

In between two buildings in Ljubljana, medieval tunnel to nowhere.

This former quarry is now a picturesque gorge that hides a sunken lake.

Naturally formed rock city in Poland.

Two monstrous faces loom over a village in Czechia.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

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

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

A once-fairy tale mansion now stands in a state of disrepair.

The world's largest collection of intentionally useless inventions.