The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

Historic medieval fortified city in southwest France.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

This ancient theater was once the home of fierce gladiatorial battles.

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

Amsterdam's former hotspot for public executions and dissections.

This gruesome biblical parade celebrates the one day a year that a bit of Jesus' blood turns to liquid.

Christ's blood preserved in a Belgian town.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Commonly acknowledged as the only public monument to the Devil himself.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

This unattributed sculpture in Amsterdam is hiding in plain sight.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

New Orleans' famous cemetery, located on the site of a former race track.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.