Hundreds of protractors affixed to surfaces all over the city.

A giant ball made from pieces of an old Jeep.

Playful installation outside a Pittsburgh art gallery might feature the world's longest historic-plaque text.

This icon of the Atomic Age now lays dormant.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

This sculpture brings optical illusion to the roadway.

The graffitied ruins stand hidden within the Pennsylvania woods.

Since the 1930s, this Pennsylvania town has celebrated the humble tomato.

Where three rails and three centuries of transportation meet.

A T. Rex statue dressed as Mister Rogers honors the children’s-television pioneer.

Public opinion is still divided on this enormous sculpture in front of Baltimore's Penn Station.

Money may not grow on trees, but it can be dispensed by one.

A war memorial that appears to ascend from its forested setting.

The largest Walmart Supercenter in the United States, referred to affectionately as “Mallmart,” has served the residents of Albany, New York, since 1994.

In Midtown Atlanta, tons of marble appears to be devouring a Fiat Panda at this unique art installation.

A slanted tomb honors the faithful, furry companion of the Georgia Tech student body.

This fountain was commissioned by a mother grieving over her son's passing.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

Giant steel and concrete dinosaurs near Route 66 invite passerbys into a mineral shop.

This small museum is dedicated to the study of coprolites, or fossilized poop.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

One of the largest helium balloons in the U.S. is a 112-foot ginormous orange.

This sculpture presents commentary on a life in pursuit of profits.

Built for an exposition in 1915, these horticultural displays have stood the test of time.