Holistic Technical Solutions to Enhance Accessible Tourism in the UNESCO World Heritage Sites. Tourism infrastructure and superstructure are created, tangible components of the tourism industry’s supply side. World Tourism Organization. 83 / Rev.1. Available at e-unwto.org. Tourists use a tiny fraction of their overall visitor spending at the actual heritage site in most destinations; main tourism spending goes towards transport and travel, accommodation, food and drink, and retail and leisure. Tourism in Mexico. Characteristics of the tourist infrastructure in Mexico. The touristic infrastructure it is a set of facilities and institutions that constitute the material and organizational base for the development of tourism.