The largest greenhouse in the world is home to over one million types of plants.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

This centuries-old hotel hides a network of secret cellars and passages once used by smugglers.

Abandoned ships along a deserted beach feel like the set of a post-apocalyptic thriller.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

This midcentury LA bar was the birthplace of tiki culture.

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

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

One of the foremost Sherlock Holmes collections is hidden away at a Toronto library.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

The creator of the carousel's bingo-pinball hybrid survives in California's oldest gaming establishment.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A life-sized mammoth sculpture marks the spot where the remains of a Columbian mammoth were discovered in 2005.

The sunken structure looks like the victim of a catastrophic flood.

A graveyard of bathyspheres and diving bells paints a weirdly accurate account of ocean exploration's rickety history.

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

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

The yawning maw of this pagan visage is said to bite off the hands of liars.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

Pick up all of the cosmic knick-knacks under the sun or take a creative writing course, all offered in this novelty storefront.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.