  Nowadays, Augmented Reality (AR) is available on almost all smartphones
creating some exciting interaction opportunities but also challenges. For
example, already after the famous AR app Pokemon GO was released in July 2016,
numerous accidents related to the use of the app were reported by users. At the
same time, the spread of AR can be noticed in the tourism industry, enabling
tourists to explore their surroundings in new ways but also exposing them to
safety issues. This preliminary study explores users' sense of safety when
manipulating the amount and UI elements visualization parameters of Point of
Interest (POI) markers in a developed AR application. The results show that the
amount of POI markers that are displayed is significant for participants' sense
of safety. The influence of manipulating UI elements in terms of transparency,
color, and size cannot be proven. Nevertheless, most tested people stated that
manipulating transparency and size somehow influences their sense of safety, so
a closer look at them should be taken in future studies.
