Lava Flows NSW and MountainsAncient lava flows from 200 million years and others from about 17 million years ago, cap some of the many mountains and intermingle with the many layers of sandstone.Blue Mountains Accommodation, there are places to stay at villages and towns along the way on the Great Western Highway. Blue Mountains accommodation includes quaint Bed & Breakfasts, Hotels, Caravan Parks, Motels and Luxurious Resorts. Other ways to explore the Blue Mountains would be to take a day tour from Sydney City Centre. Description: The Blue Mountains are the result of the ancient sandstone bedrock being pushed up over the last 20 million years. | 
