This ancient Irish tower could easily have stood in for Rapunzel's prison.

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

The "Black Arch" guards the entrance to the picturesque Glens of Antrim.

This giant sculpture is both loved and disliked by the local community.

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

The last Victorian market in Belfast.

The only monument to name all of the passengers and crew who died on the RMS Titanic.

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

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

It was once nicknamed "the most bombed hotel in Europe."

These barriers stand as stark reminders of Northern Ireland's troubled past.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

A museum marks and documents the site of the Titanic's launch.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

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

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

This automated sculpture of two men peeing will spell out text messages with their micturition.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.