One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Old Danish castle immortalized in Shakespeare's Hamlet.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

The most famous location in China was home to whole dynasties worth of imperial rulers.

A graveyard that dates back over 200 years stands near a busy shopping center.

These unusual rooms on wheels are holdovers from the 1960s.

Right next to departures—how convenient!

The romance of early commercial flight still fills this Art Deco destination.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

A former major munitions plant that has been converted into a sprawling art space.

The only place for a truly presidential dram.

Located at the former Lorton Prison the Lucy Burns Museum tells the story of the 91 year history of the prison including the dark chapter of its involvement in the women's suffrage movement.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

The rogue roots are gradually consuming some of the historic marble grave markers.

Outdoor exhibits explore the contributions of European, African, and indigenous peoples to American frontier culture.

The only recreation of William Shakespeare's indoor playhouse.

At 207 feet, one of the world's longest continuous escalators.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

One of the oldest train stations still standing in Virginia played a vital role during the Civil War.