The Standard Tour is ideal for those on a budget or those who would like a concise look at some of Gibraltar's most famous landmarks. The legendary Pillars of Hercules provide a fantastic view across the Bay of Gibraltar with spectacular views of North Africa on clear days. St. Michael's Cave is an awe inspiring network of natural caves which is also regularly used to host a number of events thanks to the fantastic acoustics found within. The apes den is home to the only wild population of apes found in Europe. Finally the Great Siege Tunnels offer an authentic look at the formidable British defenses constructed during the Great Siege of Gibraltar which were vital in nullifying Spanish attempts to reclaim the Rock during the American Revolutionary War.