Hear the quietest sound from across the dome.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The largest portal tomb in Europe has a capstone weighing around 150 tons.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

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.

A naturally mummified 2,000-year-old man.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

This coffee shop lies hidden beneath a historic church.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Iconic rock formations that allow for exploration during high or low tide.

This engineering marvel is the longest bridge in Canada and one of the longest spans in the world.

The 32nd president's sprawling cottage sits on an island enclave jointly managed by the U.S. and Canada.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

The evolution of recreational vehicles and motorhomes is on display in the “RV capital of the world."

The first artificial white water river course in North America cuts right through an Indiana city.

The folks at the Devil's Rope Museum want you to get hooked on barbed wire history.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.