Tulum The Town Is Not Far From The Ancient Beachside Ruins Of The Same Name That Perch On Cliffs Overlooking The Sea. While They Are Not The Biggest In The Mayan Riviera, Their Pure Energy Attracts Many Spiritual Seekers Who Revel In The Unity Of Age old Tumble down Stone Structures And Powerful Natural Surroundings. The Ancient Mayan City Of Coba Perhaps The Largest City In The Mayan World That Once Housed As Many As 50,000 People A Millennium Ago Lies 30 Miles To The West. These Ruins House A Perfectly Preserved Ball Court, Stunning Pyramid And Excellent Pathways That Marked What Must Have Been The Ancient Worlds First Highways Constructed By The Mayans For Trade And Political Interaction Some 1,300 Years Ago. Within A Few Hundred Meters Of Co inn Are The Cenotes, Or Underground Rivers, Are Sources Of Plentiful Crystalline Water Which Have Fulfilled Mens Needs Throughout The Centuries And Can Be Found Only In Florida , The Yucatan Peninsula And The Island Of Cuba .