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

One of Ireland's most infamous prisons for rebels including men, women and children.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

A historic freight system that found the true gold rush is in tourism.

The world's largest fully steerable radio telescope.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

Before Nixon, "watergate" meant canals.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

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

The most accurate timepiece in the world.

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

Largest Roman Catholic church in North America.

The national park was once a plantation estate.

The site of the climactic scene from the classic horror film is now a historic landmark.

"We Seceded Where Others Failed."

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The beloved, war-tested mascot of a Union regiment graces their battlefield monument.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.