Lookout Mountain straddles Georgia, Alabama, and the southern border of Tennessee at Chattanooga. The summit, called "High Point" has an elevation of 2,392 feet (729 m) above sea level. The caves of Ruby Falls are within Lookout Mountain - America's deepest cave and largest underground waterfall accessible to the public. The rock formations of the Rock City tourist attraction are on the ridge, reached by the Lookout Mountain Incline Railway, the world's steepest passenger railway. There are great views from the top of the Chattanooga Valley - "see seven states" they say.