The Grand Canyon of Texas.

DIY collection of eclectic holdings.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

A modernist landscape of water and sci-fi concrete.

An ancient stone fortress considered by many to be the eighth wonder of the world.

Looming communist pillar with a Czech twist.

A saintly relic hidden in a Prague church basement.

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

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

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

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

The first museum in the world devoted to sexual gadgetry.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Walk through Czech history in Prague's largest graveyard.

Countless grotesque faces stare out from this eerie Prague art wall.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Macabre astrological automaton clock dating to the late 1400s.

Two stunning 17th-century libraries and a cabinet of curiosities.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

A two-way chairlift system between Zugliget and the highest point in the city.