An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

A former zoo turned public park, where visitors can hang out in the old animal cages.

Elevated freight railway turned wildly successful urban park.

Electrical pylon in the shape of Disney's beloved mouse.

This humble star-gazing center touts itself as the "Birthplace of American Astronomy."

A world-class observatory in the California desert.

This former stomping grounds of the most eminent astronomers of the early 20th century.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

A bronze tribute to a legendary Californian, the self-proclaimed "Emperor of the United States."

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

A remote horde of architectural treasures fit for Indiana Jones.

Check out a shovel along with your Shakespeare.

Unlock the secrets of the conjuring arts.

Experience Larry Spring's self-taught "common sense" laws of physics.

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

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Tucked in the back of this amazing antique store is an important piece of medical history.

A museum dedicated exclusively to the lore and history of ouija boards.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

One of New Jersey's oldest churches is a historical treasure trove.

One of the last remaining movie theatres in the country that features a rear-projection system.

A massive bur oak tree believed to be some 500 years old is the centerpiece of this quiet urban greenspace.

The "Kill Bill Church" was transformed into a place of worship after a long Hollywood history.

This unassuming passageway played a key role in one of the most important events in U.S. history.