The whole world in one water tank.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

The first dish to bounce radio signals off the Moon, it was the forerunner to the U.S. Space Program.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

The only thing better than tubing down New Jersey's scenic Delaware River is doing so while eating a hot dog from a giant floating stand.

A world-class collection of mechanical musical instruments and automata.

One of the world's largest model railroads is a mind-boggling achievement.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

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

An abandoned church gets a second life as a massive beer hall and event space.

The land is home to swimming ponies and a legendary 18th-century treasure.

A historic recreation of the golden age of the Erie Canal, abandoned for some time, slowly being restored.

The lost town of Neversink, sunk by New York City.

Cryptid lake monster honored with its own monument.

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

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

On the Hudson resides one of the largest clocks in the world.

This small and serene place for quiet reflection on Staten Island was built in China based on the gardens of the Ming Dynasty.