The Rock of Gibraltar rises 1500 feet into the air. While hiking is possible, it's probably best to take in the views by car. When you're done enjoying the atmosphere, it's time to enter the rock. More than 30 miles of tunnels, most of which were built during WWII, can be explored today. Furthermore, St. Michael's Cave is an absolute must-see. A true natural wonder, this cave is a beautiful sight with light displays that change the colours of the cave walls, enhancing its existing beauty. Also not to be missed are the Moorish Castle and the Mediterranean Steps. Something to avoid? The macaques, a wild population of monkeys. Though they may seem adorable, these cheeky animals would prefer to be left alone. People are hospitalised each year due to attacks. Don't let that deter you. The Rock of Gibraltar cannot be missed!