This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Although he donated over 3,000 acres to Los Angles, Griffith's life was marred by controversy.

A piece of telecommunications history.

A museum dedicated exclusively to aircraft used in the military.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

A promising candidate for the lost rock laid by George Washington was unearthed, but the hunt is still on.

Brain collection and database that narrows the gap between man and animal.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

A completely round house designed for the Atomic Age.

The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

Dr Barnes' $25 billion private collection of art and arboretum.

A World War II-era submarine is stuck in the mud in New Jersey.

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

This methodist cemetery is slowly receding into the wilderness along a Maryland highway.

Designed to commemorate the founding of the first settlement in Delaware.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

This groundbreaking 16th-century map is known as "America's birth certificate."

If you ever wanted to own an actual piece of Disney World, this is the place to shop.

The Jewish diaspora shares a menu at this museum café.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.