St. Mary's Asylum was isolated and abandoned before being converted into a Bed and Breakfast.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

This bridge was constructed from the rubble of the infamous Bastille.

Historic medieval fortified city in southwest France.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Paris' linguistic guide to the international language of, yes, love.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Abandoned railway line circling the city of Paris.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

360° views of the city plus five floors of optical illusions and hands-on science.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

A sweet symbol marks the place where torturous executions were once carried out.

This city square dates back to the Scottish Enlightenment and was home to some of Scotland's brightest minds.

The world’s first museum dedicated to the history of childhood opened in Edinburgh in 1955.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

This Scottish graveyard is the final resting place of the man who inspired the character Ebenezer Scrooge.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

The remnants of a facade from a 19th-century market stall emporium.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Once home to a Scottish baronet, this 18th-century historic house doubles as a legendary art space.