The Houston Museum of Natural Science is a science museum located on the northern border of Hermann Park in Houston, Texas, USA. The museum was established in 1909 by the Houston Museum and Scientific Society, an organization whose goals were to provide a free institution for the people of Houston focusing on education and science. Museum attendance totals over two million visitors each year. The museum complex consists of a central facility with four floors of natural science halls and exhibits, Burke Baker Planetarium, Cockrell Butterfly Center and the Wortham IMAX Theater. The museum is one of the most popular in the United States and ranks second only to the American Museum of Natural History in New York City in attendance amongst non-Smithsonian museums. Much of the museum's popularity is attributed to its large number of special or guest exhibits.