Take a full day tour and discover the UNESCO World Heritage area of Sydney's Blue Mountains, also the location of Jenolan Caves. Begin your journey at Echo Point for a great view of the Three Sisters rock formation, then drive through Katoomba, the most visited town in the Blue Mountains. Take a guided tour of Lucas Cave, the largest of the ancient Jenolan Caves. Finally, enjoy a photo opportunity at Blue Lake - formed from mineral-laden water seeping through the limestone caves.