This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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

Fantastically decorated underground chambers built in the 1760s.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

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

Created hundreds of years ago, the magical follies and landscapes at this park were almost lost to time before being restored.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

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

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

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

This former military airfield's claim to fame came from a lucky accident during the Second World War.

Three bridges straddle a stream, one stacked upon the other.

This ancient oak tree sheltered accused "witches" in the 17th century.

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

The abandoned buildings of a hospital that saw most of its activity during the World Wars.

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

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

A memorial commemorating the only Scottish police investigation into an extraterrestrial incident.

This ethereal, rainforest-like gorge is home to waterfalls, quaint bridges, and fairy folk.

The abandoned transportation hub hides within the Glasgow attraction it once served.