An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

The Grand Lodge of Ireland is one of the oldest in the world, full of fantastical, elaborately themed rooms.

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

An alchemical monument that represents "Earth, Air, Fire, and Water."

A medieval cave used to shelter local hermits now holds nearly 200 old Quaker gravestones.

There's a labyrinth of manmade tunnels stretching for over an acre beneath Bristol.

An authentic, seaworthy replica of the ship that sailed to Newfoundland in 1497.

Once a meeting point for great thinkers, and the midpoint of the country.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

This ordinary street was made infamous by a legendary visit from the devil.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

The only surviving piece of Copenhagen's 16th-century defensive wall.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

The world's first combination ski slope and power plant.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Hans Christian Andersen for the postmodern world.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.