Streetdirectory.com HDB Cassia is located in Geylang, Singapore. Geylang Singapore is famous for being Singapore’s red light district due to the rampant prostitution here. There are many hotels in Geylang including budget hotels such as Hotel 81 & Fragrance Hotel, partly to accommodate this trade. Apart from brothels, Geylang is extremely popular with durians and Chinese food. Ironically despite being known as a red light district, there are many places of worship in this district, comprising mainly temples and mosques. Religious artifacts and books can be found here, e.g., in the Buddhist Library. Geylang houses many associations and clans. You also see many small art galleries and studios lodged in the small lanes here.