Part mural and part sculpture, this work of art sits in the middle of the Promenade, as if swimming in a river of asphalt towards the ocean.

A hidden subterranean installation offers a view of the sky.

The first artificial white water river course in North America cuts right through an Indiana city.

A modern mechanical planetary system, part of a 10,000 year clock.

An actor's tribute to a former mentor.

The house is an iconic pilgrimage site for fans of the Illinois-based emo band.

The inconspicuous grave of the University of Illinois' first president is just steps from the main quadrangle.

The oldest experimental corn field in America is still creating better ways to grow crops.

Fragments of a massive unfinished sculpture sit near the main quad of the University of Illinois.

These murals have been brightening a Chicago beach for more than 30 years.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

340 bicycles, 65 feet high.

Centuries of biking history are nestled in the shadow of the birthplace of contemporary mountain biking.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

100 year tradition of fist fights, marked by marble footsteps.

Where Venice's gondolas go for a tune-up.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

A shining, cold, black organ lies in San Francisco's financial district.