A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

Stockholm's deepest subway station is also a stunning ecological wonder.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

The library's graceful rotunda is like a bibliophile's temple.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This wilderness hike to a waterfall has an unlikely beginning in suburban Reno.

An eccentric millionaire's personal curio collection includes at least one shrunken head.

Eastern zen meets Western grit in these four little trees growing out of a rock on Lake Tahoe’s Nevada shore.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

This beloved roadside attraction welcomes visitors with his signature neon smile.

The arch that celebrated the completion of the Lincoln and Victory highways.

Staves, storm-calling, and of course, necropants.

The suspected burial mound of legendary Viking Björn Ironside.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

The Ozarks' strangest dwelling.

This Birnam-based garden honors the legacy of 19th-century children’s book author Beatrix Potter.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

The final resting place of soldiers' loyal canine companions.

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.