A Route 66 filling station that was designed to resemble the Hagia Sophia, and is now the symbol of an arts district.

This giant mimetic milk bottle has encouraged Route 66 travelers to choose dairy since 1948.

The only airport with a people mover system designed by Walt Disney Imagineering.

The largest protected conservation area in the Ozarks—a region that stretches into northern Arkansas and southern Missouri.

A historical house furnished with authentic pieces from the Victorian period.

Yup, that's where the name came from.

The largest spring in Northwest Arkansas is also home to a sprawling botanical gardens and a historically significant bluff.

Travel through the hidden underbelly of the city in colorful tunnels filled with art and history exhibits.

Named for the 39 tribes that live in Oklahoma, this restaurant's menu deliciously highlights local flavors.

Two gushing waterfalls of hot spring water within a block of each other.

A hidden courtyard houses early 20th-century plaster masterpieces.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

A small section of native wilderness on a university campus

This small park features a monumental fountain wall, providing a great photo opportunity in the middle of Houston.

The helicopter that "Tricky Dick" absconded from the White House in on his last day in office.

What was once a summer home next to a waterfall has now become littered with graffiti and children in swimsuits.

From a canyon-like gorge, more than 20 million gallons of water emerge every day, while a smaller spring drips down, creating the illusion of an endless, gentle waterfall.

Though it's no longer a functioning train depot, this castle-like structure is an important piece of Oklahoma history.

The United States' first transcontinental automobile road came to its end at this spot in San Francisco's Lincoln Park.

The only fully-realized skyscraper built by the famed American architect, Frank Lloyd Wright.

Journey up the capitol building's cupola for an amazing view of Topeka.

An entire subdivision was accidentally built on a flood plain, resulting in its eventual demolition—but the streets are still there.

One of the first skyscrapers in Santa Monica, and a famous getaway for the Hollywood elite of then and now.

This well-traveled chess park offers scenic views of the pacific and a colorful, eclectic clientele.