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

A series of stained glass artworks that depict images of the hit TV show.

This picturesque lighthouse at the edge of the Irish Sea looks like a giant stone pencil.

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

An Irish cemetery filled with victims of political strife and violent conflict, including the grave of Bobby Sands.

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

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

Northern Ireland's Brobdingnagian stepping stones.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

According to legend, this tomb holds the secrets to time travel.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Two thousand artifacts from around the world collected by one woman who loved to travel.

A massive sustainable farm designed by the mastermind behind Central Park.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

The final resting place of New Orleans' most famous voodoo priestess.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

This forgotten chalk mine was reopened thanks to a massive effort from the local community.

Overlooking the seaside town of Margate stands a tribute to an artist's lover.

These pretty kitties killed and ate as many as 135 railway workers.

To find the "unicorns of the deep" you've got to go downstairs.

Hear the quietest sound from across the dome.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Today, Kent's medieval monarchs hold court on a busy pedestrian thoroughfare—or at least their statues do.