Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

Rustic natural hot springs in the deciduous rain forest.

Shoreline strewn with the remains of ghostly fallen trees.

This parking garage has given itself over to graffiti artists and the neighborhood can't thank them enough.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

An ice cream parlor chain that caters to vegans and pinball fans equally.

A giant Troll lurks under one of Seattle's oldest bridges.

A beautiful final resting place for some of the noteworthy deceased.

One of the only cooperatively owned bars in the nation wears its eclectic history on its walls.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

The prototype for all Nazi concentration camps.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

A wall of chewing gum moonlights as collective art.

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

The modern birthplace of Irish freedom.

One of Ireland's most infamous prisons for rebels including men, women and children.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

A beautiful but toxic fountain of mercury.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.