This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

Where beautiful signs live on forever.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

This little-known rival to the Library of Congress houses one of the largest collections of pre-1876 American books, newspapers, and manuscripts.

Colorful clay cliffs tower over an unofficial nudist beach on Martha's Vineyard.

Locals purchased this abandoned quarry in order to make sure it continues to be overgrown.

Over fifty whirling pools left by the glacial age.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

One of the most scenic falls in Massachusetts has a history of death and grim legend.

Lost subway station nestled beneath Toronto's busy commuter line.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This collection of neon icons is preserving Arizona's history, one sign at a time.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

The subtle science of a master molecular gastronomist.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

One of the camera company's former manufacturing buildings is now a museum dedicated to its history.

The site where Michigan launched its first rocket into space lies abandoned in the dense woods along Lake Superior.

Hidden beneath the waters of Lake Michigan rests a perfectly intact ship from the early 1900s.

This observatory comes complete with three separate telescopes and a dedicated community of amateur and expert astronomers.