Trace the history of the nation’s early days at the site of America’s oldest stock exchange.

This overlooked courtyard and museum celebrate Benjamin Franklin's life and achievements.

The oldest surviving presidential residence in the United States.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

Postmodern architect Robert Venturi’s gift to his mother stands as an example of the midcentury’s wild swings in building aesthetics and design.

Benjamin Lay, a fiery abolitionist, is buried outside the Quaker meeting house that disowned him for his beliefs.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

The world’s largest street art museum.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

A lush indoor jungle fills this bustling Madrid transportation hub.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

This colorful statue welcomes visitors to a Barcelona park.

An early 20th-century bullring converted into a modern shopping center.

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

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Catalonia Tradition: Beating the hollow Christmas log until it defecates in your fireplace.

Order cookies baked by cloistered nuns in a 400-year-old monastery.

Sometimes called the Banksy of Madrid, Muelle was a pioneer of street art in the Spanish city.

This little sun pays homage to a massive gate that once stood at this location.

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

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.