The largest stretch of the Berlin Wall is right on top of the former SS headquarters

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

It houses the remains of a 17th-century version of the Titanic.

Sweden's oldest animated sign is still lighting up the skyline today.

Stockholm's narrowest alley is barely over two feet wide.

Stockholm's deepest subway station is also a stunning ecological wonder.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

One of America's most historic homes also holds a startling literary legacy.

One of the last remaining movie theatres in the country that features a rear-projection system.

A black and white mural stands out from its psychedelic surroundings.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

This building is more than 250 years old and was built in one of the first towns settled in Massachusetts.

The oldest surviving wood-frame building in North America is still in the family.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

The strikingly modern structure stands out among the brick buildings speckling the Harvard Business School's campus.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

A winding, cliffside stretch of road overlooking the Delaware River.

Oldest existing wire suspension bridge in the United States.

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

A parade of antique steeds offers a quirky ride through history.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

A logging-themed roadside restaurant surrounded by museum-quality machinery and artifacts from the industry's heyday.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.