This rooftop sign has been confusing Milwaukee-bound airline passengers for decades.

Sports history, made in the Arroyo Seco.

One of Hollywood’s favorite government buildings.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

A replica of the first public theater built in California.

The California capital city once stood 10 feet lower than it does today.

I Street Bridge is the heaviest swinging center bridge in the United States.

Art Deco stylings conceal the true nature of this bridge.

The capitol city's oldest existing cemetery.

At this 1940s-era neighborhood favorite, you can still drink a cherry phosphate.

With nickel-steel armor and three-inch thick bullet resistant windows, FDR's train was a rolling fortress.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

This replica of the Greek structure is in the heart of Nashville.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

An early life spent in this "Old Kentucky Home" inspired the writings of North Carolina's most famous novelist.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

Eighteenth century house of the mysterious "Father of Raleigh."

The first "Hut" was actually a small brick building.

The grandson of a Kiowa chief created what has become the iconic symbol of a city on the Plains.

A mysterious and terrifying public art goblin seemingly meant to inspire local legend.