This giant sculpture made of trash is a critique of society's wastefulness.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The world's oldest bookshop still in operation.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

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

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

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

A Christian monastery stands on what was once a holy Incan temple.

The collection of intricate sculptures includes one carved from a mammoth's tusk

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

France's most famous cemetery, with some of its most curious tombs.

One of the oldest hospitals in the Americas is now decorated in hallucinatory murals.

Every year, the colorful murals of Montreal get a complete makeover.

A fantastic place to see murals, and an important location in the history of Toronto's legal street art scene.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Macabre astrological automaton clock dating to the late 1400s.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

An intricate network of underground tombs carved into volcanic rock.

These caves secretly held national treasures during World War II.

A Byzantine-era church hidden in a wooded area below the Acropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.