One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Home to items never before seen by the public.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

These rows of World War II-era bunkers were the scene of some of the infamous Mothman sightings.

A small storefront museum explores the history and myth of West Virginia's famous urban legend.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

The last Victorian market in Belfast.

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

This beautiful architectural gem was the first waste treatment facility in Boston.

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

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

Belfast's namesake river still winds below the city center, hidden from sight.

This massive monument has been telling the time for 150 years—at a slight angle.

These engineering masterpieces are a dominant feature of the Belfast skyline.

A pair of stones embedded in an Edinburgh street memorialize one of the city's last public hangings.

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

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

This early version of the guillotine was used to execute the man responsible for its construction.

The final resting place of soldiers' loyal canine companions.

A six-ton wedding present for the King of the Scots.

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

The 16th-century church has the only stained glass windows that survived the Scottish Reformation intact.

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