“…Moreover, GPS technology can supplement diary data recorded by hand (Wolf, Guensler, & Bachman, 2001). In recent years, there has been a growing use of Global Positioning Systems (GPS) technology focusing on visitors' mobility in small historic cities (Modsching, Kramer, Ten Hagen, & Gretzel, 2008;Shoval, 2008;van der Spek, 2008;Tchetchik, Fleischer, & Shoval, 2009), confined attractions like theme parks and zoos (Pettersson & Zillinger, 2011;Russo, Clave, & Shoval, 2010), natural parks (Arrowsmith & Chhetri, 2003;Hallo et al, 2012;Harder, Bro, Tradisauskas, & Nielsen, 2008) and small islands (Nielsen, Harder, Tradisauskas, & Stilling-Blichfeldt, 2010;Xia, Zeephongsekul, & Arrowsmith, 2009). Each of these locations has a clearly defined entry and exit point, making both the selection of potential participants and the modeling of their movements easier tasks.…”