Pompeii's less famous neighbor is still revealing her secrets.

A submerged archeological park still holds the wonders of a Roman Sodom.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

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.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

Hidden beneath the streets of London is a secret subway that only carried mail.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

An abandoned jewel of a ballroom on the top floor of Australia’s busiest rail station echoes with the sounds of a bygone era.

The "Seinfeld" diner.

The remains of Alfred Nobel's first nitroglycerine factory can still be found on the shores of a Swedish bay.

This luxury hotel suite is located deep in the bowels of an old mine.

A floating underwater hotel, created by a Swedish artist.

Stone carvings record the Norse myth of Sigurd, providing a glimpse into Scandinavia's transition from paganism to Christianity.

Bring your hiking shoes, wool socks, and thermal underwear for a stay in these cozy forest huts.