Bukit Timah Nature Reserve was one of the first forest reserves established in Singapore. The 163-hectare reserve retains one of the largest tracts of primary rainforest left in Singapore. The forest has been a botanical collecting ground for more than a century, Bukit Timah Nature Reserve is also home to Singapore's highest hill at 163.63 m. Composed mainly of granite, Bukit Timah Hill was once an active quarrying site in the mid-1900s. Click here for more information about the park.