The remnants of a 19th-century ironmaking complex hidden in the woods of Connecticut.

The cave where two British judges hid in exile after sentencing the king to death.

Astonishing collection of helmets, scientific instruments, and medical models.

This abandoned ironworks was once the most important military supplier in America.

This petite park lets visitors see and touch examples of fossilized dinosaur tracks.

Forgotten under the construction of a new urban roadway is a small, abandoned part of town.

Hidden behind a Target are pillows of cooled lava that formed at the bottom of a deep lake in the Mesozoic Era.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.

Amazing views of Long Island Sound can be seen from this mountaintop tower.

This "thrice-cursed" island is allegedly home to Captain Kidd's lost treasure.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

Home of Philip Johnson, one of the 20th century's most influential architects.

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

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

This strangely amalgamated museum explores the history of the Timex clock company as well as archaeology.

This isolated community does not want you to visit.

What appears to be an act of fruit vandalism is actually a cultural statement.

These Benedictine nuns have been making artisanal cheeses since before it was cool.

A famed data visualizer's personal sculpture garden is a landscape of modern and megalithic wonders.

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

A castle inspired by medieval architecture is hidden in the woods of Connecticut.