A toweringly silly piece of modern art has been delighting locals since the 1980s.

What is it about mushrooms that makes people wish they lived inside of them?

Mussolini gave Cincinnati a bronze statue of Romulus and Remus suckling at a wolf's teats.

An art deco ice cream shop covered in vintage tiles.

An obsolete, vanishing traffic device warns Cincinnati drivers away from middle-of-the-road obstructions.

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.

Where the alchemists dream of transmuting base metal into gold was actually achieved.

This subtle Berkeley paving stone actually marks off a lawless tube of air that extends into space.

The Laureates here get something even more coveted than a Nobel Prize: free parking for life.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

This graffiti-covered bridge is the quintessential vision of a place for disillusioned youth to escape the complexities of burgeoning adulthood.

Special tunnels built so that frogs won't be killed when crossing the highway.

Seven ceramic sculptures are scattered around this California college campus.

Outsider art or homage to aliens?

This museum boasts the ninth-largest collection of insects in North America.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

The face of a woman pushes its way through the earth.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

The only Bahá'í house of worship in North America and one of only a handful worldwide.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

A science teacher's dream.