A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Become a prohibition rebel.

Read a book next to a Midtown waterfall.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Elevated freight railway turned wildly successful urban park.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

This natural rock "church" might not be a proper chapel but that doesn't mean it's not beautiful.

One man's swirling six-acre monument of stone.

"A hideous albatross in the Hudson River Valley."

This ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

The remains of this deep, dark mine have left behind a haunting rocky warren of tunnels.

This World War II relic let Allied pilots know they were entering neutral airspace.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

Achill's most recently abandoned village dates back to to the Age of Enlightenment.

This small Irish village suffered the greatest loss of life when the Titanic sank.

It was once nicknamed "the most bombed hotel in Europe."

Legend says the water within these mysterious sacred springs stays cold even when boiled.

A brisk climb up this solitary peak leads to the origin story of a towering figure in Irish history.

The atmospheric road was never meant to be so creepy.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

A particularly disconcerting tribute to Irish martyrs.