A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

The vaulted ceiling is home to a scurry of “squirrelgoyles.”

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

Where America's first doomsday cult awaited the end of the world.

The last street in Pittsburgh that's paved with wood.

A view-altering observatory at the University of Texas.

Free public park and gardens filled with peacocks and peahens.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

A stunning cemetery famous for its extraordinarily delicate & lifelike mourning sculptures.

Claude Monet immortalized this medieval bridge in two of his paintings.

"Drunken ship" sculpture memorializing the French poet in the city where he died.

The construction of a tram line unveiled hidden remnants of the old medieval city.

A French artist's vague warning hangs over Belleville.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

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

Paris' linguistic guide to the international language of, yes, love.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

One of Canada's oldest museums, the beautiful Redpath has been serving up Natural History and Ethnography since 1882.

A museum in the heart of Virginia peanut country devoted to the humble goober.