One of the oldest, well-preserved water treatment facilities in all of Europe.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

Looming communist pillar with a Czech twist.

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

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

This doorless 20th-century elevator doesn't stop or slow down.

This artificial cave looks like something out of a fairytale.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

This life-size monument honors the legacy of a famous literary feline.

This small Brazilian museum honors the work of a German biologist who studied the jungles for decades.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

A free, canine-friendly alternative watering hole near the more famous Barton Springs.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

This eclectic Austin curiosity shop is home to all things strange and unusual.

A former electrical substation is now home to an eccentric junk art masterpiece.

This eclectic, mosaic-clad home includes a bamboo ping-pong loft and a "Whispermaphones" intercom.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

One part antique store, one part curiosities hodge-podge.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.