Botanical garden is one of the most beautiful places in Singapore. Its distinctive features are the early opening time (5 am) and free admission. The garden was founded in 1859. On the territory of the park is the National Park of Orchids, with the largest collection of live orchids in the world. Here you can buy an original souvenir - a germ of live orchid and later grow the flower at home. In 2012, the garden was included in the preliminary list of the UNESCO World Heritage Sites.
I would strongly recommend visiting Botanical garden. The place is very beautiful, with an incredible amount of exotic flowers, colorful compositions and even a rainforest.
A large map of the park

The Vanda Miss Joaquim, a natural orchid hybrid between Vanda teres and Vanda hookeriana, was first discovered in the garden of Agnes Joaquim in Singapore in 1893. On 15 April 1981 it was declared as Singapore's national flower. ©Yuriy Buriak
Getting there: The nearest metro station is Orchard, then walk along the Orchard road. At the end turn left and walk about 1 km to the botanical garden. The following buses stop near the park: 7, 105, 123, and 174.