A vacation in Cancun, for most people, means hanging out around the pool at their all-inclusive resort, sunning on the beach, and taking in all the entertainment typical of a world-class resort city. But history buffs will want to schedule a tour inland to the ancient pyramids built by sophisticated civilizations hundreds and hundreds of years ago. No Cancun trip is complete with this tour. You’ll travel a few hours on a modern air-conditioned motorcoach to walk around an ancient stone city in the middle of thick jungle, and climb to the top of a pyramid for an awe-inspiring view of the landscape around you.