A physical reminder of Earth's ancient past, this rock results from the photosynthetic processes of some of the oldest forms of life.

These grassy undulations on a stretch of University of Michigan campus aren't bad landscaping, they're art.

An ever-evolving wall of graffiti art off East Liberty Street.

The 10-foot-tall vegetables belong to Michigan’s first food rescue program.

A horse-drawn 1858 steam pumper fire engine encased in glass on the front lawn of a Michigan insurance company.

Perched atop a brick smokestack, this enormous lug nut symbolizes the local minor league baseball team.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

The plants form a living library and laboratory for researchers and students at Michigan State University.

This mechanical wonder towers above a river in Michigan's capital city.

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.

The only presidential monument to display a late POTUS's actual casket.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Less a museum than a bizarre fantasy world created by artists and engineers.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A historic freight system that found the true gold rush is in tourism.

These 500-year-old frescoes depict the city in its glory days.

A brutalist gem towering over the heart of Milan.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Third time's a charm, or in this case, two testicles are.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Artistic tombs, monuments, and a beautiful "Hall of Fame" lurk inside this cemetery.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.