Where: The Cockrell Butterfly Center is located at the Houston Museum of Natural Science, 5555 Hermann Park Dr, HoustonCost: Adults, $12; children 3-11, $10; children under 3, free. Yup, you guessed it -- the Cockrell Butterfly Center. 2) When the Cockrell Butterfly Center opened in July 1994, it was one of only a few such centers in the country. The spectacular, three-story structure has a 50-foot waterfall, several trees, tropical flowers, leafy bushes, a pool, some tortoises and even an iguana named Charro -- oh, and obviously, hundreds and hundreds of butterflies. AdWhile undoubtedly its most lively attraction, the Cockrell Butterfly Center is by no means the museum’s only offering of note.