An abandoned 18th century manse looks like something out of an Indiana Jones movie.

Hidden beneath the streets of London is a secret subway that only carried mail.

The sign at the garden gate reads: "These Plants Can Kill."

Local legend says this unusual chimney is actually a broken-hearted man's tomb.

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

This star-shaped artillery fort protected the mouth of the Thames from the 16th century to the Second World War.

No one is sure what to do with this WWII shipwreck that sits at the bottom of the Thames, still loaded with tons of explosives.

This early Norman castle was the first historical monument protected by an act of Parliament.

These ruins of Francis Bacon's once-magnificent manor are hidden in the English countryside.

This crumbling 14th century chapel became so unstable the roofing apparently collapsed during a wedding ceremony, narrowly missing the curate's head.

All that remains of the fishing-vessel-turned-warship is its weathered hull.

Historical etchings such as “Miserable, wild, distracted 1350" and “The Archdeacon is an ass.”

This Roman quarry once held secret masses and smuggler's contraband and is now home to rare species of bats.

This 15th-century fortification was built to defend bunnies.

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

A little-known ruin with a convoluted history and a fascinating latrine drainage system.

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.

The abandoned fishing village was swept right into the sea.

Now isolated, this church was once the center of a bustling village that succumbed to the Black Death.

The wreckage of an old coastal trading vessel is only visible at low tide.

This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

A preserved 18th century steel factory.

A 600-year-old mini shrine guarded by a sword-wielding knight hides in a crumbling cliff face.

The intended purpose of this unfinished Elizabethan building remains a mystery.