Jalan Air Terjun was the original route that leads down from the Botanic Gardens Waterfall to town. It continues through Ayer Rajah Road, now called Jalan Tunku Abdul Rahman, through Macalister Road into George Town.
With the creation of Western Road and the Botanic Gardens, the significance of the Waterfall - and Waterfall Road itself - was eclipsed. Today only a section of Waterfall Road remains, as the road behind the Nattukkottai Chettiar Temple, emerging across from Jalan Tunku Abdul Rahman.