This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

Resonating tubes make music from highway overpass.

An acoustic anomaly with a mysterious cause.

Artwork tucked within the trees greets visitors with surreal sonic experiences.

At night, this glittering musical tunnel draws skaters and photographers.

Metal water storage tank turned ethereal concert hall.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

The place of worship erected not once, but three times in one of the most desolate places on Earth.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

This spherical sculpture has also been dubbed "the steel orange" due to its likeness to a massive, sliced piece of citrus.

This strange statue depicts a young boy's body with an adult Mozart's head and a single wing.

A peculiar samurai statue overlooks the center of Brno.

This ruined castle perched atop a rocky peak is a great place for a hike.

A Cold War secret surveillance tower used to spy on radio communications.

Tall columns of volcanic basalt make up this improbable-seeming rock formation.

Massive installation of Europe's negative stereotypes.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

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

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

A massive, abstract lookout tower providing a panoramic view of Prague.