The twists and turns of this serpentine maze are over 170 years old.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

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

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

The language and heritage of a nearly forgotten culture can still be explored in this Southern enclave.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

A field of nothing but boulders which resembles a giant's gravel driveway.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

A building so large that it has its own weather.

Stunning Roman aqueduct used for 1900 years and still standing.

"A hideous albatross in the Hudson River Valley."

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.