The needs of everyday life for communication and interactivity anywhere and at anytime have led to the tremendous development of mobile devices and applications. Nowadays, we want to have access to enhanced services with high quality at indoor and outdoor environments. Smartphone is a clever new media that supports interactivity and communication among users at various environments permitting the transmission of multimedia content. A cultural heritage site is a special type of environment where users need the provision of high-quality smart services like virtual guides in a friendly, portable, cheap and highly interactive way. The use of their own smartphone devices gives an answer to the user's needs. In this work, we investigate the capabilities and limitations of smartphone devices as an educational device in a cultural heritage site and environment. We classify users and cultural content of cultural heritage sites aiming at proposing educational scenarios that cover the needs of various user groups such as curators, teachers, students etc. Especially, we propose services which will give users the opportunity to have an interactive virtual tour at a cultural site. We also propose a role-based access control scheme for the use of the proposed services. Finally, we give guidelines for the implementation of the proposed educational services that promote visiting cultural heritage sites. (Contains 12 figures.)