A roadside attraction is a feature along the side of a road, that is frequently advertised with billboards to attract tourists. In general, these are places one might stop on the way to somewhere else, rather than being a final or primary destination in and of themselves. It was primarily a U.S. phenomenon in the 1940s to 1960s.
With the building of the U.S. interstate highway system in the mid-1950s, most roadside attractions were by-passed and quickly went out of business. But the most famous remained attractive enough to travelers to make them leave the comfort of the highway for a brief time and remain in business.