Mayan Ruins of Tulum are a spectacular site to behold. If the ruins themselves weren't enough, the setting on the beach is a true place to declare Heaven. The shocking turquoise water and the bold black cliffs join to create an awe-inspiring picture. The archaeological site is one of fascinating exploration. Once thought of as a fortress, the ruins of Tulum are actually what once was a busy site of commerce. This was a walled city of laborers, astrologers, farmers and nobility. There are three walls to protect the city from outsiders, the remains of several house-type structures, burial sites for the kings, a tall pyramid and two structures on each corner of the fence to guide the planting of crops. Tour guides are available to take you through the ruins and explain each building. They are well worth the price, about $35 USD for 1-4 people. There are no brochures available but there are signs at each site that have a small amount of information. You are free to swim or sun at the beach below the ruins, and there are several places to take pictures and enjoy the view from above. After you have visited the ruins, there are many, many booths and shops of typical Mexican handicrafts and souvenirs to browse through, as well as several small food and drink vendors. Plan on three hours minimum to enjoy the ruins of Tulum.