By the start of the 20th century, Ferril Lake, the Denver Zoo, and the landmark boat pavilion, with a Spanish-style design by architects John Humphreys and William Fisher were all developed in the park. Reinhard Schuetze, a German immigrant who was the head landscaper for Denver, formalized the design of the park by planting of formal gardens, laying down graceful carriage ways, and creating the East High School Esplanade into the park. In 1903, construction was completed for the first wing of the Denver Museum of Nature and Science, which was built on the eastern edge of the park on the highest elevation in the park (now famous for its views of downtown and the mountains behind them). It opened to the public on July 1, 1908.