What might be the oldest living tree in London has survived fires, bombings, and estate agents.

Tucked between a side street and a theater, this arch once led to a prestigious riding school, and now opens to a courtyard and community garden.

America's first National Historic Landmark is a 100-foot tall obelisk and gravesite dedicated to the only casualty of the Lewis & Clark Expedition.

This 19th century Sioux City candy company is the home of the Twin Bing, a historic, chocolate-covered treat.

A quartet of brightly colored mythical beasts stand sentry at this gateway.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

Brass bricks outline the locations of Edinburgh's lost, lively market stalls.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Small sculpted heads of prominent phrenologists mark the outside of their former headquarters.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

This unassuming shed was the stage for a monumental event in British history.

This stack of stones honors a murdered 18th-century woman.

One of Edinburgh's oldest pubs hides a 19th-century skittles alley in the back.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

A sweet symbol marks the place where torturous executions were once carried out.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

The fountain marks the area where hundreds of accused witches were burned at the stake.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

The little-known second castle that William the Conqueror built in York.

Follow the original medieval paths that wind through this intriguing section of the city.

This medieval church is not only notable for its architecture, but also its connection with LGBTQ+ history.