Places solarconstant Wants to Go

Home to the world's largest refracting telescope and the birthplace of modern astrophysics.

Walk 2,300 feet above the ground on the "Troll's Tongue."

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

Light still pours into the ruins of this ancient Islamic observatory.

A complicated contraption for telling time by the moon.

Running since 1864, this clock has yet to be wound, one of the longest-running science experiments known.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

The world's second-largest sundial, made entirely out of stone.

The oldest working mechanical clock in the world.

A modern mechanical planetary system, part of a 10,000 year clock.

Once the path of a railway tunnel, now home to thousands of glowing insects.

A large spinning bath of liquid mercury, used to probe the early universe.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Suburban observatory was personal lab of the father of modern astrophysics.

A Hawaiian stairway to heaven—that you can't climb.

An ancient iron pillar in Delhi that seems to be rustproof.

Started nearly 100 years ago, this science experiment just keeps on going, ever so slowly.

Rippling sand dunes frozen in the Arizona rock.

A seemingly endless landscape of pure salt stretches far across Bolivia.

The biggest solar telescope in the world helps reveal the secrets of our sun.

Massive crater in central Oregon.

A 30-acre garden inspired by the principles of modern physics.

An ancient capital city that dates back 3,000 years and harbors many surprises.