An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

A private residence adorned with a gorgeous mural dedicated to the buzzing insect.

Hundreds of protractors affixed to surfaces all over the city.

A giant ball made from pieces of an old Jeep.

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

There aren't too many operational funiculars around, but Pittsburgh has two!

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Depending on who you ask, this controversial treehouse is either a charmingly creative child's playhouse or an illegal encroachment on public land.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

A building shaped like the Army Corps of Engineers logo, because why not?

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

The span is crooked and made from two older recycled bridges.

The national park was once a plantation estate.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A painfully obvious spy house sits right across the street from the Russian Embassy.