One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

An actual 1957 Cadillac De Ville, encased in 15 cubic yards of concrete.

America's smallest "national forest" has only 33 trees.

The first custom-designed building to showcase the works of Dale Chihuly is a wonderland of glass and light.

A moody and picturesque riverside ruin overgrown with vegetation.

This enormous World War II relic is one of the largest wooden structures in the world.

A 66-million-year-old rock formation stands tall over Mumbai, offering stellar city views.

Tasked with beautifying a disused stretch of industrial land one artist filled a hole with grass.

A comprehensive collection of bonsai set in a beautiful campus.

This abandoned Brutalist treehouse is a hidden architectural relic.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Don't bother sending any mail to this ghost town.

This First Nations monument is a peaceful spot with vast views of the Calgary prairie.

Ancient human, animal, and geometric figures drawn in the earth.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Everything you always wanted to know about borates is here.

Etched into a dry lake bed, this massive directional indicator is accurate without magnets.

These colossal desert barcodes have been fine-tuning spy satellites for decades.

The first high-tech company in the valley that actually worked with silicon devices.

Science meets wall art to highlight the beauty of famous mathematical equations.

An enclosed rotunda at the Henry Art Gallery in which viewers can look up and see the uninterrupted sky.

A former atom smasher turned into an art gallery.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.