Hundreds of huge, centuries-old horseshoes adorn the walls of this nontraditional 12th-century castle.

An intriguing three-sided folly is a testament to one man's devotion to Catholicism and the number three.

Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

The first archaeological site discovered by aerial photography.

Inspired by the colossal pyramids at Giza, this 15-foot structure is believed to be the first funerary pyramid in Great Britain.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A reportedly haunted 14th-century church is curiously facing the “wrong direction.”

A 200-year-old prison that now houses a peculiar crime museum.

The "father of immunology" used this humble hut to offer the local people some of the world's first free vaccinations.

In the 1970s, the citizens of several small villages came together to stop their homes from being destroyed for a new airport.

The lantern carried by the infamous Guy Fawkes when he was arrested while attempting to blow the houses of Parliament and the King of England to smithereens

Site of the first hot air balloon flight conducted by the first English balloonist.

This nondescript building was the birthplace of Morris cars.

Legend says the people of Wiltshire got their "Moonraker" nickname from this small pond.

This ancient Bedfordshire church was abandoned when the village's population slowly began migrating to new towns.

At this historic pub, you can sit back, sip, and watch a whole century go by.

The longest canal aqueduct in England was built without a plan to get water past the moving boats.

A rampant horde of demons smirk and snarl at visitors to this church, home to a rare complete set of medieval-era stained glass windows.

A renovated henge and stone circle just south of Stanton Harcourt village.

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

The enormous earthwork sculpture honors the ponies that lived and worked in the old colliery.

This former Welsh metal factory is now a lovely abandoned relic but was once one of the industry's world leaders.

The plaques around this 19th-century structure recall some rather strange tales.