Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

A symbol for the opposition to nuclear power around the world.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

An Elvis superfan built Denmark's own version of Graceland.

A walkable map of the world, made from soil and stone by one man.

Dozens of musicians have planted trees in this Danish park, and donated songs to go with them.

This Danish park has celebrated the American independence day since 1912.

An old limestone mine transformed into a beautiful and unusual sculpture museum.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

England's most notorious suicide spot.

This abandoned mausoleum from 1815 sits deep within the forest surrounding Callendar House.

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

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

A giant pineapple, a symbol of hospitality, and an amazing vacation rental option.

The site of the world's first modern seismometer.

Built to hold the worst of the worst of the Nazi war prisoners.

The oldest library in Scotland was built from the remains of a church to hold a churchman's library.

Perhaps the smallest monument dedicated to one of Great Britain's longest serving monarchs.

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

The location of the Bridge of Death and the Gorge of Eternal Peril in "Monty Python and the Holy Grail."

In 1990, this 37-foot red steel bottle sailed from New York to England.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.