This Arcadian garden in the Pentland Hills boasts over 270 artworks by Scottish artist and poet, Ian Hamilton Finlay.

A beautiful but toxic fountain of mercury.

Climb the dead electric pylons of Messina.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

Caves famous for the dragon-slaying saint who lived there.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

Go surfing on this urban wave, "hacked" by local surfers.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A pink sandstone column once used in ancient times to measure one's belly after a night of debauchery.

A modern mechanical planetary system, part of a 10,000 year clock.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Elevated freight railway turned wildly successful urban park.

This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

With print dying, this local paper keeps the lights on by doubling as a stunning cafe and cocktail bar.

This quirky outpost and gallery inside a former church is an unexpected trove of handcrafted art.

The most impressive of Basel's three remaining city gates.

A futuristic rocket marks the spot where three borders meet.