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

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Bronze plates placed around this Scottish fishing village form a true-scale model of the solar system.

One of the world's most complex timepieces.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

There has been an astronomical clock on this spot since the 14th century.

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

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

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Public clocks around the city chime with bullfights, cockfights, old railways, and other local traditions.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

Quirky Welsh observatory unites art and science.

A kaleidoscopic warehouse-maze of handmade neon signs.

A tongue-in-cheek arcade where the games are based on everyday life.

A beautifully eclectic mix of architectural styles.

One of Europe's largest supercomputers is housed inside of a disused chapel.

The world's largest model of our planetary system.

Used as an example in one of the first dictionary entries for "museum" in 1706.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.

A treasure trove of astronomical, mathematical, and scientific instruments at Cambridge University.

A complicated contraption for telling time by the moon.