Cave shrine on Monte Pellegrino.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

A historic freight system that found the true gold rush is in tourism.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

Bangkok's men with dangerous jobs come here in search of protective talismans.

A shrine built to combat the bad karma of a commercial venture.

Frida Kahlo's childhood home, now a museum of her life and works.

A museum in the former home of Marxist revolutionary Leon Trotsky.

This historic hotel invented the chocolate brownie.

A lush green oasis in the middle of Chicago.

Hot Doug's "Hot Dog" Stand.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

This historic Illinois "Muffler Man" has been converted from axe-touting lumberjack to rocket-wielding space ace.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

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

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Notorious artist squat renovated into legal studios.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The celebrated eyesore created by starry-eyed sweethearts.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

Former self-sufficient mental institution now a planned community.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.