A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

Trace the history of writing at this unusual North Carolina destination.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

A bust of the first president welcomes visitors to the only town in America called George, Washington.

The only free-standing, vertical sundial in the US was keeping standard time before it was even invented.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Settled in 1696, abandoned after the Revolutionary War.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

A wunderkammer hidden on the top floor of the Hartford statehouse.

Built by the patriotic residents of Boonsboro in a single day.

Several times a year, during low tide, two pairs of historic train tracks are revealed on this New Jersey beach.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

100 years later, they're still down there.

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

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

These mechanical goats first battled it out in the year 1551, all because of an overcooked deer.

In the town of Åtvidaberg, the midday sun sets off a loud cannon boom.

The Arctic Circle runs through this isolated spot north of Iceland.