Copán was once at the center of Mayan civilization. The present ruins are quite substantial and a major tourist attraction in western Honduras.
There are shuttles (small busses) and there is a bus line from antigua in guatemala
the place is not that big so you can do it on foot, you could do horse riding close by
the ruins and the countryside, local life is quite calm
next to visiting the ruins you might take some spanish classes, there are 2 schools that are good
There is a ViaVia Hostel run by Belgians that offers great sleeping accomodations for backpackers at a very reasonable price They have very good food