Viator Exclusive: Coba Ruins Early Access Tour with an Archaeologist and Cenote Swim from Cancun. Explore the ancient ruins of Coba, including early morning access with an archeologist guide. Take this Viator exclusive tour, which can't be booked anywhere else, to discover one of Mexico's most spectacular ruins during this all-day excursion. Enjoy lunch and round-trip transportation from Cancun hotels. Climb Nohoch Mul, the tallest pyramid on the Yucatán Peninsula while learning about one of the largest settlements during the Classic period from your knowledgable guide. Swim in the refreshing waters at Aktun Chen cenote to cool off. Book this Viator Exclusive: Coba Ruins Early Access Tour with an Archaeologist and Cenote Swim from Cancun from $59.99.