Houston Zoo The Houston Zoo in Hermann Park has evolved tremendously since its beginning in 1920 with a lone bison named Earl. Since then, the zoo has grown into a world-class facility that plays a leading role in animal conservation. The Zoo covers more than 57 magnificently landscaped acres and receives 1.5 million visitors annually. The city zoo also includes nearly 5,500 animals with more than 800 species. The zoo is open from 10 a.m. to 6 p.m. daily.
Admission is free on municipal holidays.
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