Go inside to really appreciate this 500-year-old technological masterpiece.

Two stone columns flank the grand Venice square, but there were supposed to be three.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

This monumental fountain has moved around the city multiple times.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.

The walls and streets of the ancient city are peppered with penises.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The world's oldest rose is so tough it survived being bombed in World War II.

Volkswagen's dedicated museum dives into the complex history of one of the world's best known cars.

Single runway interrupted by a busy road that cuts across its middle.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

A statue commemorating a beloved stray dog who was adopted by the entire neighborhood where he lived.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Artist Natividad Sánchez wrote a new ending for one of Roman mythology's tragic love stories.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

Huge stairway leads to this massive gallery.

Destruction from Armenia's 1988 earthquake inspired an artist's sculptures of scrap metal.