One of the largest trees of its kind in California.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

These murals stand as reminders to the troubled history of this Northern Ireland city.

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

The modern birthplace of Irish freedom.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

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

The heads of two giant mythological water horses honor Scotland's horselord past.

This World War II relic let Allied pilots know they were entering neutral airspace.

The ruins of a medieval monastery named after a type of tree.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

A stunning Victorian abbey and walled garden on a lakefront.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

This 19th century hydroelectric powerhouse was the first of its kind.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

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

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Experience what life was like in Ireland during the Viking and medieval ages.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.