Introducing the Green Fairy to her fawning masses.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

The oldest operational cathedral in the U.S. has one shell of a way of projecting speakers' voices.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

San Francisco's newly reopened hands-on science museum.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

42nd story Pyramid shaped penthouse tops Seattle's oldest skyscraper.

A walk through the historic city center, under the streets of Seattle.

The four tall pillars once marked the entrance of the historic Seattle church that fought for women's suffrage and civil rights.

A large AIDS Memorial Pathway art installation provides a moment for quiet contemplation in this public park.

The first park built over a freeway is a brutalist masterwork.

This twisty sign depicts the chain's first logo.

On Hilton Head Island this bronze King of the Sea rules all things briny—and lets you know if you’re late for lunch.

A unique bridge with an equally unique view.

A meteorite-bounded town in Bavaria.

The stones of this formerly witch-obsessed castle were used to build a church.

This Rococo church is known as the most beautiful village church in the world, and does not disappoint.

A striking 12th-century-style castle built on the edge of a cliff.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

A freedman baker’s lavish tomb has a relief showing various stages of Roman bread making.

Created by a local artist, these quirky sculptures each have their own names and personalities.

Enormous crabs, bioluminescent jellies, and other amazing creatures from the ocean’s depths—some of which are in an aquarium for the first time ever.