A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

This hotel has hardly changed in over a century, like a time capsule of old Oregon.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

Eighty million natural history specimens call this gargantuan museum home.

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

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

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

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

Make your reservation to have coffee with some kitties.

A short hike into the mountainside forest reveals a decaying 1890s town.

A whimsical village of unique treehouses resides in a Washington forest.

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

A library of only unpublished manuscripts.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

This former Texas landfill is flush with 300 million-year-old fossils, all fit for the taking.

From under the bed of one of the co-founders, this server helped launch the notorious file-sharing website.

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

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

More than a century of radio history is told in these displays.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

A quirky assortment of musical marvels from around the world.

This small cemetery is all that remains of Atlanta's first Black communities.

Healing Springs that once ran red with soldiers' blood.