Balboa Park (San Diego) failed and is scheduled for completion in 2019. El Prado, a long, wide promenade and boulevard, runs through the park's center. Most of the buildings lining this street are in the Spanish Colonial Revival architecture style, a richly ornamented mixture of European Spanish architecture and the Spanish Colonial architecture of New Spain-Mexico. Along this boulevard are many of the park's museums and cultural attractions, including the San Diego Museum of Man, the San Diego Museum of Art, the Museum of Photographic Arts, the San Diego Art Institute, the San Diego Model Railroad Museum, the San Diego Natural History Museum, the
Balboa Park (San Diego) as Florida Canyon. The earliest recreational developments in the park were in the "Golden Hill Park" area off 25th street. The National Register listed the rustic stone fountain designed by architect Henry Lord Gay as the oldest surviving designed feature in the park. Other attractions in the area included a children's park, walking trails, and a redwood bird aviary. Preparations for the 1915 Panama–California Exposition created much of the park's present-day look-and-feel and designed amenities. Beginning in 1909, San Diego Chamber of Commerce president G. Aubrey Davidson suggested that the park hold an expo to coincide with the 1915 opening