An ancient Egyptian temple sits within a modern European museum.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

Ghosts of France's colonial past.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

This massive library holds what was once the largest book collection in the world.

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

A little slice of Japan and its aesthetics in London's Holland Park.

A hands-off space for graffiti artists to hone and display their skills.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An ancient Egyptian temple in the middle of Madrid, Spain.

Today this former Nazi concentration camp stands as a poignant memorial to the victims of fascism, and a warning from history.

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

On this romantic tidal island reachable only at low tide the tomb of a famous French writer overlooks the sea.

In France, a medieval-style home pays homage to an intrepid explorer who discovered Québec.

This small island, a byproduct of 19th-century canal construction, is now home to a charming Japanese garden.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

A Gothic cathedral created from volcanic rocks.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

This historic Canadian jail was once the longest operating prison in the country and is now open for people to incarcerate themselves.

Every year, the colorful murals of Montreal get a complete makeover.