divers since the 1960s. The Monterey Bay Aquarium on Cannery Row is one of the largest aquariums in North America, and several marine science laboratories, including Hopkins Marine Station are located in the area. Monterey's historic Fisherman's Wharf was constructed in 1845, reconstructed in 1870 and is now a commercial shopping and restaurant district with several whale-watching entities operating at the end of its pier. Monterey is home to several museums and more than thirty carefully preserved historic buildings. Most of these buildings are adobes built in the mid-1800s. Some are museums and open to the public, including the Cooper Molera Adobe, Robert Louis Stevenson House, Casa Serrano, The Perry House, The Customs House, Colton Hall, Mayo Hayes O'Donnell Library and The First Brick House. Many others are only open during Monterey's annual adobe tour. The Monterey Museum of Art specializes in Early California Impressionist painting, photography, and contemporary art. Other youth-oriented art attractions include MY Museum, a children's museum, and YAC, an arts organization for teens. What may be the only whalebone sidewalk still in existence in the United States lies in front of the Old Whaling Station, left by New England whalers while California was still part of New Spain. Cannery Row is a historic industrial district west of downtown Monterey. Several companies operated large sardine canneries and packing houses from the 1920s until the 1950s when the sardines were overfished and the industry collapsed. The neighborhood was a minor tourist attraction until the late 1980s when the Monterey Bay Aquarium bought the former Hovden Cannery and built their aquarium around it. The Aquarium revitalized the neighborhood and it is now the number one tourist destination on the Monterey Peninsula. It is home to more than 600 species of plants and animals. Several of the canneries burnt down in the 1970s and some of their empty foundations are still visible along the oceanfront. A free heritage trolley transports visitors between downtown Monterey and the Aquarium during the summer. Once called Ocean View Boulevard, the street was renamed Cannery Row in 1953 in honor of writer John Steinbeck, who had written a well-known novel of the same name. It has now become a tourist attraction with numerous establishments located in former cannery buildings, including Cannery Row Antique Mall which is located in the most historically intact cannery building open to the public. Other historical buildings in this district include