An L.A. traffic island where the faces of locals have been carved into massive granite eggs.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

Pluto is still considered a planet in Ithaca, New York.

Native Americans built this circle of stones, which was used to predict astronomical events.

This mountaintop observatory is home to one of the world's largest reflective telescopes.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

A stunning two-story timepiece within a medieval Brick Gothic church.

Macabre astrological automaton clock dating to the late 1400s.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

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

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

The world's newest astronomical clock is also its most accurate.

One of the world's most complex timepieces.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

A constellation of golden cobblestones shows the names of local children born under a full moon.

This massive crater in the middle of nowhere was used to train astronauts for moon landings.

A daily replay of the experiment that proved the rotation of the Earth.

This collection of bronze hands comes from astronauts, presidents, baseball greats, and more.