out streets, promoting sales, and building the Point Loma Railroad in 1909 to connect Ocean Beach with the rest of San Diego. By 1910 there were 100 houses in Ocean Beach, compared to just 18 two years earlier. According to historian Ruth Held, Collier's rail line "made OB possible." He also built Ocean Beach Elementary School (a two-room school) and donated park land to the city. Most of that land became Cleator Community Park (a ballfield), Correia Middle School (originally named Collier Junior High School), a YMCA and a church; a small remnant at Greene and Soto streets is still called Collier Park. The northern end of Ocean Beach was dominated in the early 20th century by the Wonderland Amusement Park, which opened on July 4, 1913 and was constructed on eight oceanfront acres at Voltaire and Abbott streets. It boasted a large roller coaster, dance pavilion, menagerie, roller skating rink, merry-go-round, children's playground, a petting zoo with a variety of animals including 500 monkeys, and 22,000 lights outlining the buildings. However, Wonderland went bankrupt in 1915 due to competition from the Panama-California Exposition in Balboa Park and was sold at auction. It closed in 1916 after winter storms damaged the roller coaster. The name "Wonderland" lives on in some Ocean Beach business names as well as the title of a documentary series on KPBS television hosted by Ocean Beach native Noah Tafolla. In 1915, John D. Spreckels and his Bayshore Railway Company built a wooden bridge connecting Ocean Beach with Mission Beach. The company used the bridge for a trolley, part of the San Diego Class 1 Streetcars, which connected OB with Downtown San Diego and encouraged the development of both Ocean Beach and Mission Beach. The bridge was demolished in January 1951, thereby cutting off through traffic to Ocean Beach from the Mission Beach and Pacific Beach communities. The small cottages, bungalows, single-family homes and two-storied apartments in the residential areas, were filled with college students from several local colleges, joined by a good number of sailors, retirees and middle-class families. Some of the bungalows built as tourist accommodations atop the cliffs on either side of Niagara Avenue are still in use as businesses and homes. With the dredging and development of Mission Bay and the dismantling of the Ocean Beach-Mission Beach bridge, O.B. became geographically isolated from the rest of San Diego and the other beach communities,