|Just a few meters from Tulum´s beaches is Tulum´s archeological site which is a cultural icon in the Riviera Maya. In its heyday, Tulum served as a port of call for mariners and traders, and its walls defined the ancient town`s defense against invaders from sea and land. The site is surrounded by a 5 m (16 ft) thick wall on three sides, interrupted by five gates. The entrance to the ruins is about a 5-minute walk from the archaeological site. The city square includes artisans` stands, a bookstore, a museum, a restaurant, several large bathrooms, and a ticket booth. Incomparably beautiful, the ancient site clings to the cliffs overlooking the intense turquoise blue Caribbean Sea. The most iconic structure of this site is El Castillo that with its beachfront location dominates the skyline where sea and cliffs meet in an impressive panorama that stimulates all the senses.