A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This Puget Sound military post has a long, turbulent history as a gateway to the Pacific.

This graveyard contains markers and monuments dedicated to some of the darkest chapters in Washington's history.

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

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

A nondescript Seattle restaurant inherited a piece of European history.

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

Essence of hound's tongue and tincture of bloodroot are just the tip of the herbalist iceberg at this beautiful, impressively-stocked apothecary.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

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

A faithful reproduction of Al-Jazari's enormous water clock.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

There is an art, a science, and certainly a responsibility to occupying The Big Red Chair, and this is where it's learned.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

An ancient octagonal weather station named for the eight Greek gods of wind.