The Blue Mountains Botanic Garden, originally known as the Mount Tomah Botanical Garden, is a 28-hectare (69-acre) public botanic garden located approximately 100 kilometres (62 mi) west of the Sydney central business district at Mount Tomah in the Blue Mountains, in New South Wales, Australia. The garden is heritage-listed and is located on the boundary of the UNESCO World Heritage Site Greater Blue Mountains Area and can be accessed via the Bells Line of Road.