Wikipedia
Geylang (, ), also known as Geylang Serai, is a planning area and township located on the eastern fringe of the Central Region of Singapore. It is bordered by Hougang and Toa Payoh to the north, Marine Parade to the south, Bedok to the east and Kallang to the west.
Situated just outside Singapore's Central Business District, Geylang is well served by the country's transport network. Geylang Road and Sims Avenue are major roads that run through the area, connecting Geylang with Kallang and the Central Area in the west, as well as Bedok and Changi in the east. Six Mass Rapid Transit stations serve the town, Aljunied, Dakota, Eunos, MacPherson, Mountbatten and Paya Lebar.
Geylang is infamously known as the red-light district of Singapore. With many brothels dotting Geylang Road and along various other lanes in the area. Asian prostitutes mostly from other countries like Thailand, Indonesia, Vietnam and China work in Geylang, and visitors and locals alike flock to the area each evening and stay till morning. The town is home to hundreds of brothels. Some are regulated, while others operate behind the scenes illegally. The houses in Geylang operating in sex practices are easily identifiable; their house numbers are large and bright red.