High above one of Madrid's busiest streets, a woman nobody can identify has been watching passersby for nearly a century

Three bridges and one giant canyon make up this fantastic Spanish settlement.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

This playground sculpture of an icon from the past is dedicated to the children of the future.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

See four top-secret US spy aircraft of the Cold War era, including the legendary SR-71 Blackbird and the A-12 Oxcart.

The road plays 30 seconds of the Marine’s Hymn when driving over the grooved pavement.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

A temporary art piece to celebrate LGBTQ Pride is now a permanent part of Stockholm's traffic landscape.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

A student driver's nightmare.

At almost 1,000 years old, this is the oldest known door in all of Britain.

Giant, friendly pelicans in Central London, the most unlikely of places.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.