Glenbrook Lagoon is a fresh water lagoon located in Glenbrook, New South Wales at the foot of the Blue Mountains. Bordered by suburban-style streets and houses on four sides, it serves as a reminder of the areas historic bush past. Best known for being discovered by William Lawson, William Wentworth and Gregory Blaxland on their crossing of the Blue Mountains in 1813,[1] the waterhole was later used to cool the engines of the early trains.[2] The ruins of the stationmaster's house can be seen in the bushland to the north of the lagoon.
In 2006, the Blue Mountains City Council commenced a lagoon restoration project, removing weed infestations.[3]