The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

This giant boulder is pinched over a 1000-meter abyss by two mountains.

This fantastical icy castle is built anew every winter.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

A soon-to-be-forgotten roadside spectacle loaded with local lore.

Flaming barrels of tar race through these village streets on Bonfire Night, a tradition that dates back centuries.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

Death road of Bolivia.

A 16th-century horror show built in a lovely Italian garden.

A monument to the art of slicing people open.

Once the most densely populated place in the world, this island is now a ghost town.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

The trials and tribulations of marking Poe's grave.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

A hidden alley in urban Baltimore is a haven for graffiti artists.

The slate extracted from these Pennsylvania quarries was once hailed as the finest in the world.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

A small museum along the Susquehanna River is home to a rich collection of Native American artifacts.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

An abandoned stretch of highway, deteriorating next to the operational one.