Over a dozen Native American earth mounds dating back over 2,000 years dot this Tennessee archaeological park.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

Willy Wonka would love this weird half-a-home.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A little sculpture with a large wardrobe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

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.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.

A colorful square marks the heart of the city's LGBTQ community.

This replica of the Greek structure is in the heart of Nashville.

A rare example of World War I trenches from the British front.

Museum in a swimming pool where the water still flows.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

The celebrated eyesore created by starry-eyed sweethearts.

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

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

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

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

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

Indents in the pavement are all that remain from a grisly death machine in Paris.