Within the framework of a workshop for the “ Heritage Values ” project, the GAPP (Heritage and PublicArchaeology Group) at University of Barcelona organized an intense seminar about public interaction in archaeology. Intense, because we had the opportunity to share and debate projects and ideas with nearly 20 colleagues in one day, which started for me at 5 am to take the train from Madrid to Barcelona. The seminar consisted of three parts: sustainability and participation in heritage policy; cultural tourism and new technologies; and the role of public archaeology as a participation tool. The outcomes of the seminar will be published soon, so I will not make a traditional review of the different papers presented, but rather a general comment on the topics debated and will share some thoughts about them. Image: Seminar poster and programme (source: Universitat de Barcelona ) How do we interact with the public as professionals? How does the public interact with arc