The oldest surviving botanic garden in the United States.

This beautiful site is where the first transatlantic telegraph was sent from.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

A hugely vast Irish landscape of barren rock that stretches for miles.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

Huge standing stones mark a site of megalithic mystery.

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

An ancient neolithic tomb that only sees the sun twice a year.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

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.