These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

This 19th century granite fortification is one of the most well preserved forts in New England.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

Once thought to be the fabled Holy Grail, it is now known to be an oil lamp.

The 28-foot granite map plots the locations of 40 theaters in New York City.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Cryptic messages embedded in the New York City sidewalk.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Tucked away amidst some of the most famous addresses in the world is New York’s only fraction of a street.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This bridge was constructed from the rubble of the infamous Bastille.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

10,000 flowered plants bloom in the City of Roses.

The seamy, underground secrets of Portland's criminal past.

Portlandia is the second-largest copper repoussé statue in the United States.

Carrying on the legacy of a short-lived experimental school tucked away in the mountains of North Carolina.