The secret medieval communication system will whisk your words above the noise of the crowd.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

See what remains of a once grand ancient Roman circus.

A small sculpture that pays homage to the famous bronze ear of Ca de l'Oreggia—or does it?

The mark of the Devil's horns on a marble column in Milan.

Just across from the "Last Supper" painting is the famous painter's vineyard, a gift received for creating the masterpiece.

Real bones which are said to have belonged to a Polish dragon.

This grubby wall is said to be one of the Earth's esoteric energy centers.

Inside this Krakow church, an explosion of psychedelic color.

Remnants from a time before electricity.

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

A replica of a famous Greek statue adorns the front of the unusual home of architect and alchemist Humberto Pittamiglio.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

A lush indoor jungle fills this bustling Madrid transportation hub.

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

Banksy's image of a naked man dangling from the window of a sex health clinic.

A historic, reportedly haunted pub that provided inspiration for several famous adventure novels.

There's a labyrinth of manmade tunnels stretching for over an acre beneath Bristol.

A pocket of jungle amidst urban expansion in Panama.

As one of the world's largest hydroelectric dams this plant took two countries to get built.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

An underexplored, 130-foot tropical waterfall that you will have all to yourself.

The largest open-air contemporary art center in South America is a unique experience in the Atlantic Forest.

An art museum with an eclectic design and a scandalous past.