This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

An unusual collection of self-made musical instruments and unique noises.

Rare documents, old instruments, and gruesome specimens showcase the history of military medicine.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

Stelae-eyed stones greet visitors to a corner of Kirov Park.

Pictures tacked onto trees remember the more than 40,000 of Stalin's victims buried here in mass graves.

A fully functional, 200-year-old remnant of the time when Brixton was mostly fields.

This Georgian Gothic building was created to shelter and feed deer.

The secret wartime bunker built on the platforms of an abandoned Tube station.

Locals spent years successfully fighting to save this beloved Brutalist behemoth from demolition.

Soviet intelligence had a keen interest in the Cold War linguistic school at this old Scottish airfield.

This lonely metal cross may hint at the true location of a medieval showdown between Christian and Pagan kingdoms.

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

A great example of the inventive canal bridges that were deliberately split down the middle.

This 1913 single-screen cinema is a charming survivor in the age of the multiplex.

The last working windmill in the U.K. that has eight sails.

This two-towered gateway is all that remains of the unluckiest pier in the world.

For over 500 years this timbered alms house has provided a home for elderly residents of Coventry.

This tallest folly in the world began its life as an elaborate factory chimney.

A 17th-century church is nestled within the walls of a 15th-century ruin.

What was once England's second-richest abbey is now a haunting ruin.

The UK's largest private house was the subject of a long-lasting political dispute.

Though much of the castle was robbed of its stones, the underlying earthworks are among the best-preserved in England.

Manchester salvaged this sculpture of the adopted Mancunian when it was no longer wanted in Ukraine.