The approximate spot where the last Grand Master of the Knights Templar was put to death.

This 18th-century sundial was designed to calculate the date of Easter each year.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

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

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.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

A haunting collection of the vanished and disappearing natural world.