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

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Mining caused an asbestos emergency in this small town.

A classic mystery spot complete with spots that are said to make you shrink or grow when you stand on them.

A little-visited ghost town state park offers a glimpse into Montana’s "Silver Queen."

The oldest continuously-operating Chinese restaurant in the United States has been in business since 1911.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

This Old West prison built into the side of a cliff was said to be inescapable.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

An American ghost town hides along a side street in Scotland's capital.

This allegedly haunted 16th-century tower house-turned-museum exhibits thousands of spectacular objects.

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

Long abandoned underground complex to keep royals safe from a nuclear war that never came.

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

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

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

360° views of the city plus five floors of optical illusions and hands-on science.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

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

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.