These pastel showcases of the Art Deco style from the twenties, thirties, and forties were in disrepair until the late seventies; their restoration in turn sparked the South Beach renaissance. Today, on the southern tip of Miami Beach, there are approximately 1,000 prime examples listed on the National Register of Historic Places�the largest concentration of Art Deco architecture in the world. The finest examples are clustered on Ocean Drive, Collins Avenue, and Washington Avenue, from Sixth to 23rd streets. The Miami Design Preservation League, the group that spearheaded the restoration, conducts several different tours of the neighborhood Wednesday through Saturday and provides audio for self-guided tours.