A spectacular disused railway viaduct in a beautiful countryside nature reserve.

The largest of only eight working transporter bridges left in the world.

Pyramid shaped monument with a tall tale attached.

Wander around the extensive remains of this 12th-century medieval church.

The excellent acoustics of this natural amphitheater made it a popular preaching spot for the founder of the Methodist Church.

This strategically placed hill fort has served defensive forces from the Iron Age up until the 20th century.

The whimsical steel spider lurking in the shadows of this suspension bridge shows that engineers can have a sense of humor.

An enormous alien invades Woking, England, as an homage to the H.G. Wells classic 'The War of the Worlds.'

This surreal art house looks like a geometric version of a small chapel.

The remains of an anti-aircraft battery from World War II look out over Glasgow.

Legend has it the famous Robin Hood would attend mass at this 12th-century Cistercian abbey in Sherwood Forrest.

This quaint mortuary chapel hides a stunning Celtic Revival and Art Nouveau interior.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

These ancient ruins were the final resting place of King Henry II's mistress.

Though difficult to access, this stunning cave has a place in Scotland's poetic history.

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

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

This stretch of the River Severn where large waves flow against the current is the birthplace of river surfing.

Historic church where a number of Shakespeare's actors are buried.

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

These remarkable cascades are the jewels of Upper Tees.

An abandoned, desolate train tunnel that was used during World War II.

This ruined folly was originally built to honor a failed American state that would have become "Westsylvania."

This 19th-century island fort built to protect against an invasion by sea.