This 15th-century island fortress later served as home to the executioners no one wanted to live near.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

Italian cave with exceptional acoustics and an unsavory history.

The world's most active stratovolcano is almost always erupting.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

Ancient snack bar of the Roman Empire re-opened.

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

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

Copenhagen's celebrated theme park and gardens.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The former home of Norway's greatest romantic composer.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

This bridge was constructed from the rubble of the infamous Bastille.

The celebrated eyesore created by starry-eyed sweethearts.

Mountain where Jesus was first tempted by the Devil.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Hear the quietest sound from across the dome.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.