The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

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

The city is full of whimsical portals to another world.

The final resting place of the camel who served with the Confederate Army during the Civil War.

This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

Western New York's largest independent bookstore doubles as a historical repository of all things Niagara Falls.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Enormous lake at the bottom of a unique cave system.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

Two small markers remember the Alamo's feline protectors.

Steep canyon walls hide a forested oasis in the West Texas desert.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

This statue of the "father of television" stands prominently in the United States Capitol.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

Washington's iconic carousel has a nice piece of Civil Rights history.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.