A photographer spent 40 years documenting America's unique roadside attractions in more than 11,000 photos. Here are the coolest ones.

· The Library of Congress just released more than 11,000 images of roadside attractions and classic Americana into the public domain.
· Critic and photographer John Margolies took the high-resolution photos over 40 years of traveling around the country.
· The photos document drive-ins, car washes, diners, and other unusual...