A curious urban windmill once owned by a renowned British mathematical physicist.

The ancestral home of beloved English poet Lord Byron has a bizarre history.

These carved medieval "mercy seats" are among the finest in the world.

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

These abandoned coal mine towers near Sherwood Forest might soon boast the U.K.’s longest zip-line.

Constructed 20 years ago, this sculpture is slowly fading to the hands of time.

These bleak 800-year-old ruins were once the royal residence of choice for hunting in Sherwood Forest.

In the right conditions a wall of water up to five feet tall flows upstream against the current on the River Trent.

This Bronze Age burial mound used to be called "Robin Hood’s Piss-Pot" until it was renamed by spoilsport Victorians.

A quartet of rusting satellite goliaths are all that remain of a communication network that protected Britain from German and Russian air strikes.

A memorial to American oil drillers who volunteered to travel secretly to England in 1943 and work in the U.K.'s only oil field.

Once a palace for the Archbishop of York, these 15th-century ruins now serve as a haunt for history buffs.

This 600-year-old tower was built as a comfy residence for cherished pigeons.

One of the oldest libraries in England, and one of the last of the great medieval chained collections.

One of the earliest large-scale "hyper" roofs in the U.K. is now a derelict roadside attraction.

A magnificent mansion hides a delightful collection of historic timepieces.

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

This memorial pays homage to the Royal Air Force squadron that breached two important dams during World War II.

The final resting place of hundreds of Polish airmen who died fighting the Nazis in Britain.

This lone tower casts an outstretched shadow over the site of a once-wealthy Knights Templar preceptory.

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