A disastrous D-Day rehearsal was relatively unknown until this sunken tank was discovered 40 years later.

Slovenia's first mosque is a striking mix of Islamic and modernist architecture.

This monastery built into a cliff hides a perfectly preserved hermit in a glass coffin.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Pompeii's less famous neighbor is still revealing her secrets.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This 16th-century close preserves an unusual piece of Edinburgh's transportation history.

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

The fountain marks the area where hundreds of accused witches were burned at the stake.

The building where Mary, Queen of Scots was said to have bathed in white wine.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

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

This concept building is the UK's first attempt at making a permanent structure of nothing but trash.

According to local folklore, this odd face on a wall of Rudyard Kipling's former home can bring visitors a bit of luck.

This memorial to the thousands of Indian dead during WWI was callously used for target practice during WWII.

Tucked between a side street and a theater, this arch once led to a prestigious riding school, and now opens to a courtyard and community garden.

A private selection of curiosities, carefully curated by a young Brighton local.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

Where condemned pirates met their grisly end at the gallows on the River Thames.