The narrowest street in Paris.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

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

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

California's most comprehensive horticultural library.

This print shop boasts one of the largest pinball arcades in San Francisco.

Gold Rush-era tombstones line the park's paths.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Outside San Francisco lies a small clown cemetery and memorial.

A vast city of the dead, where the deceased outnumber the living by more than a million.

The neighborhood church casts a breast-shaped shadow that locals have come to call the “two o’clock titty.”

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

Art in the form of a winding, man made crack in stone.

Frank Lloyd Wright died a year before construction on his largest public project even began.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

An extensive collection of ancient Egyptian artifacts and mummies.

The headquarters of a secretive order is also a beautifully-designed park.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

A tiny survivor of the Donner Party disaster.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.