This Indianapolis landmark offers a secret panoramic view of the city. 

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

For over 100 years, this Indiana town has had a tree growing out the top of the local courthouse.

The largest historic preservation organization in the United States.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

The oldest remaining authentic Putt-Putt course that Donald Clayton created in Ohio.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

Rare recess caves fill this unbelievably beautiful Ohio park.

Here began Southern California's oil boom over 100 years ago

A living museum documenting the history and produce of California's citrus industry

This enormous World War II relic is one of the largest wooden structures in the world.

A historic office and commercial building located in the heart of downtown San Francisco.

This house made famous by the 1980s movie is now a restaurant filled with Top Gun memorabilia

A legendary West Hollywood bar where celebrities shoot pool with the locals.

Allegedly haunted by Walt Disney himself, this inconspicuous lamp is always kept lit in his honor.

A family agreed to sell their property to Disney on the condition that this tree, planted as a wedding gift, would not be removed.

Inspiration struck on this seat outside the Griffith Park merry-go-round.

Thousands of turbines whir at the origin of North American wind power.

Wander down a side street dedicated to one of the members of the Beat Generation.

A tribute to the movie stars who fought to keep Beverly Hills separate from Los Angeles.

A tribute to the disposable cups that were once manufactured here, this 68-foot-tall statue would be difficult to throw away.

With its peeling paint and faded sign, this theater-turned-recycling plant is a nostalgic relic of 1950s Americana.

Located close to a movie studio lot, this restaurant has a long history of star-studded patronage.

The famous blue house from the classic horror film "Halloween" is now a local landmark.