A natural history museum in Chicago, Illinois has won the designation of “America's Best Restroom” for its sleek design, eco-friendly facilities, and ability to handle the needs of 3,500 visitors per day.

The online poll held by a business-supply company invited Internet users to nominate public restrooms across the nation.

The men's and women's restrooms at Chicago's Field Museum were voted top restrooms for including child-size facilities, nursing stations, and airy design depicting a calm night sky. The facilities also won praise because they are cleaned hourly, to accommodate the museum's many visitors each day.

The Field Museum triumphed over some other quirky finalists, including the portable restroom set up for the inauguration of President Barack Obama. The toilet-in-a-trailer featured granite counters, hardwood floors, and a flat-screen television.

Another finalist, in a Brooklyn, New York restaurant, features toilets that are flushed with collected rainwater.

And a men's restroom in a casino in Las Vegas, Nevada, features urinals that are set into a graffiti-covered piece of the Berlin Wall.