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

The signs of a long buried road can still be found hidden beneath a London sewer grate.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

The bones of two medieval royal lions were discovered at the historic fortress.

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

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

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

One of the best beaches in the entire world.

A monument to the 4,114 Irish orphan girls who arrived in Australia between 1848 and 1850.

The statue honors an adventurous seafaring cat.

You can climb to the top of the world's largest rocking horse.

Dine aboard the historic Ghan train while retracing early explorers' journey through the Outback.

These bronze sculptures sow whimsy by hamming it up on a pedestrian mall.

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

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

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.

Home to items never before seen by the public.

An overlooked memorial honoring the local Washington residents who died in World War I.

The "lovely red Vega" of the legendary record-settling pilot.

There’s a hidden military meme engraved on the World War II Memorial.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

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

Perhaps the most scandalous statue of America's first president.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.