Las Copán Ruinas entry $15/person are the highlight of Copán. Although quite extensive, they are not as huge as Tikal in Guatemala or Teotihuacan in Mexico, but there is more sculpture here than any other Pre-Columbian city. The ruins are prized for the carved stellae of ancient rulers, and the well preserved hieryoglyphics including the hieryoglyphic stairway. Also in the archeological park is a marvelous Mayan museum entry $7/person with a reconstructed temple and fabulous artifacts. Fans of Maya art or ancient ruins can easily spend two full days between the two main ruins sites and museu. The tunnels are reportedly not worth the extra fee, and are not authentic, having been dug by archaeologists in the 1980s these tunnels were originally dug for investigation and they show to the visitors the buried parts of older temples since the Mayans built on top of the older structures to make the new ones taller . In July 2011 it was possible to visit the Sepulturas on the next day without purchasing a second ticket although the main ticket office may not tell you this.
It's recommended to be there when it opens at 8AM, as the site gets very hot by mid-day. Hire a guide at the entrance to the ruins for $25 divided between however many people you can collect. Cesar 30s, good accented English and Antonio 60s, few teeth, excellent English are recommended if they're around.
Besides the ruins, the countryside is attractive. Slow paced local life is quite calm, and farming of corn, beans, coffee, and tobacco is the main vocation.