This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

Opened in 1911, this small shop is the oldest ongoing establishment in St. George.

An island on the Venetian Lagoon hosts this stone chair that has nothing to do with the King of the Huns.

US-50 in Nevada is known as "the Loneliest Road in America," but this earlier iteration of the route is even lonelier.

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

This macabre shop, filled with art, oddities, and taxidermy is hidden in the heart of the French Quarter.

This sturdy, circular stronghold served as one of the forts that protected the Venetian Lagoon.

A brutalist gem towering over the heart of Milan.

A picturesque example of brute-force engineering conquering nature.

California's first suspension bridge.

The last SR-71 ever constructed.

The scene of a legendary hunt is displayed on this building's facade.

Art Deco stylings conceal the true nature of this bridge.

Once home to one of the oldest banks in the world, this building is also where Marco Polo's famous travelogue was written.

This conservation area is also home to many of the region's desert tortoises.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

One of the tallest lighthouses in the world also serves as a monument to the fallen of World War I.

This historic floating crane became an unlikely symbol of the port of Trieste.

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

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

Artistic tombs, monuments, and a beautiful "Hall of Fame" lurk inside this cemetery.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

The remains of this medieval Roman road and lookout towers dot the rugged coastline of southern Lazio.