These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

The schoolhouse where Jesse Merwin, the inspiration for the "The Legend of Sleepy Hollow" character, once taught.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

A museum dedicated to the quirky and colorful world created by Springfield's favorite son.

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

Tucked into Pittsburgh’s North Side, the Mattress Factory is a labyrinth of permanent, room-sized installations where artists transform entire spaces into mind-bending, immersive worlds.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

A bronze statue of Mister Rogers in the neighborhood where he grew up.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

An office built to look like a giant basket.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

A bronze of the man in all his sinewy glory celebrates his longtime connection to the Ohio city.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

Circleville is seriously smitten with this giant gourd.

The mounds at this site were reconstructed with the help of archaeologists and historians.

The largest earthwork effigy in the world.

A pharmacy built in the shape of a mortar and pestle, now resembles a fancy cocktail.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.