This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

The first museum in the world devoted to sexual gadgetry.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

The turquoise-studded skull of a long-dead Aztec man sits within Mexico City’s Museum of Anthropology.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

This colossal ancient jaguar sculpture was used as a vessel for the hearts torn from sacrificial victims.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

The striking jade death mask of an ancient Maya king is displayed in a replica tomb in Mexico City.

The most complete statue of this Aztec god sits a top a throne carved with images of hallucinogenic plants.

The former headquarters of Mexico's Secretariat of Public Education now houses a muralism museum, including Diego Rivera's first large-scale mural project.

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

CDMX's home for the world's culinary delights.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

Frida Kahlo's childhood home, now a museum of her life and works.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

You have to know where to look in this rather ordinary-looking square to find hints of its past as a dissidents' cemetery.

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.