Numby Numby

Numby Numby, also recognized by its Indigenous name Ngambingambi, is a remarkable sinkhole situated in the Northern Territory of Australia. Located near Borroloola, this natural formation is distinguished by its warm, inviting waters, maintained at a constant temperature of 32°C (90°F) by an underground hot spring. The sinkhole is cradled by imposing high cliffs, with access to the water facilitated by a steep path through a washout on its northwest side.

Description and Environment

The environment within Numby Numby is conducive to swimming and features large lily pads that flourish in its shallower areas. The sinkhole possesses significant depth, measuring at least 60 meters (200 ft) from the shoreline, indicating a substantial subterranean cavity. Its unique geological characteristics and the presence of the hot spring make it a distinctive natural feature.

Cultural Significance

Beyond its physical attributes, Numby Numby holds profound cultural importance for the Indigenous peoples of the region, including the Yanyuwa, Garrwa, Gudanji, and Marra language groups. The sinkhole is intrinsically linked to the ancestral stories of the Rainbow Serpent, known as Bujimala, and a creation narrative involving two initiated young men. According to legend, the Rainbow Serpent, angered by the young men's actions, emerged from underground to create the sinkhole, subsequently transporting them to the Sir Edward Pellew Islands.

Access and Exploration

While the sinkhole offers a unique swimming experience, access is challenging due to the steep terrain. The surrounding cliffs and the nature of the access point suggest that it is not a developed tourist facility, but rather a site of natural and cultural significance. Few details are available regarding its discovery or geological formation period, but its cultural narratives highlight its ancient importance.