Natural history museum celebrating biodiversity with a parade of taxidermy animals.

A haunting collection of the vanished and disappearing natural world.

The first green space constructed on an elevated viaduct.

This museum houses an imposing skeleton army comprised of creatures great and small.

A museum of carnival attractions where you are invited to ride the rides.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

The attic of a four-century-old canal house hides a clandestine church.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.

Saintly bones pressed into a wax effigy of a Catholic superstar.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

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

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

A pair of connected skyscrapers form this symbolic gateway.

The Sun King's military models, saved from the Louvre.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

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A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

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