The term smart has become a buzzword and lately it has even been associated to the tourism. In fact, new technologies are revolutionizing the tourism market establishing the Smart Tourism. The topic Smart Tourism is strictly linked to the topic smart city. As it will be discussed later in the work, the Smart Tourism is easier to implement in those cities that have already moved to become smart cities. Adoption of IoT systems such as sensors and beacons are generating huge amount of digital information named Big Data. More tourism destinations should make an optimal use of big data. The tourism industry is composed by several stakeholders and thanks to the technologies mentioned before, stakeholders have the opportunity to collect useful information for themselves or for other actors.