Quaint, disturbing, and macabre objects are all on display at this intriguing collection of medical instruments from bygone eras.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.

This hidden green space is the city's second largest conservatory.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

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

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."