America's most famous piece of self-built architecture.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

The remains of the oldest synagogue in Britain lay forgotten for seven centuries, hidden under a humble shop.

Gothic tower where Lord Alfred Tennyson wrote the poem "The Sleeping Beauty."

A motley, fantastical agglomeration of unlikely houseboats along the Shoreham-by-Sea riverbank.

This desolate boat was once a key form of public transportation for Portslade residents.

A vintage penny arcade hidden in the back of a fun fair-themed bar.

A mysterious artist-run cabinet of curiosities and library.

Surreal riveted sea forts once protected the Kent shores from German attack.

London's smallest police station is barely the size of a phone booth.

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

A 18th century graveyard and its astonishing cortege of macabre iconography.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

The remains of Crystal Palace Great Exhibition of 1851.

The final resting place to 300 Victorian-era pets hides inside the city park.

An incarceration museum on the spot of possibly the oldest prison in England.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

A fantastic castle rumored to be the birthplace of King Arthur.

400-year-old garden, restored to beauty.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

Hear the quietest sound from across the dome.

A historic house left in "dramatic still life."