A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

Stalactites and stalagmites in a beautifully lit cave.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

A modern sliver of architecture in Roma.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A sculpture serving as an homage to Pope John Paul II.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

Former hunting lodge of a duke who was an avid collector of impressionist works.

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

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

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

A never-finished memorial to the heroes of the Napoleonic War has become "Scotland's Folly."

Protecting the dead from opportunistic body snatchers.

This small museum in a 17th-century building honors three iconic Scottish writers.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

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

The only castle in North America to ever house European sovereigns.