* The tour is not limited to visiting one observation deck, the day will be so eventful that you will find this day the longest in your life. The Sulak Canyon area is one of the most famous and visited natural attractions in Dagestan, visited annually by millions of tourists from all over the world. Sulak Canyon is one of the deepest canyons in the world, with a depth of up to 1920 meters and a length of 53 kilometers.