The world's first time capsule lies behind a welded steel door in Atlanta.

A clock designed to run with perfect accuracy for 10,000 years.

The oldest inn in England served brew to the crusaders.

A glorious pub known for a spiteful printing feud and its famous typeface lost—then found—at the bottom of the Thames.

The smallest pub in Britain was once a cabinet of curiosities and it still has the dead cat to prove it.

Its buzzing collection honors vibrator history.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

World's only nuclear reactor operated by liberal arts undergraduates.

An underground magnet for ever-changing street art.

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

Tucked in the back of this amazing antique store is an important piece of medical history.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

The Boston square dedicated to the dark poet who was born nearby.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

This historic hub for labor unions has survived the city's changing landscape.

This Seattle store is packed with all sorts of curious creatures and creations.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

Seattle's own bad art museum located inside Cafe Racer.

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

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.