A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

Grotto replete with mystical designs laid out in glued shell mosaics.

England's most notorious suicide spot.

This abandoned gun tower was built to defend the River Thames from a French naval attack.

This skewed English house has looked like it's going to fall over for centuries.

A winding cave grotto walkway built to provide employment for veterans after World War I.

A house of bones — but nobody is quite sure to whom they belong.

Also known as Rye Castle, this 13th-century fortification later became a prison and held one of Rye's most famous criminals.

An ancient water supply dating back almost 500 years can still be found standing in East Sussex.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.