Pictures taken by participants often include multiple elements. For example, if a picture includes
multiple elements such as water, greenery, and animals, it is difficult, if not impossible, to know which
was the most impressive object for the person who took the picture. Yet, it is important to understand
which element is the main object of the photograph in order to evaluate the visitors’ experiences.
Therefore, each of the participants was asked to specify the main element of each photograph. At this time,
if there were multiple photographs that targeted the same object, we removed the photos taken later from
the analysis, and included only the one that had been taken first. Moreover, we removed the photos that
had a negative object or were the result of mistakes in the operation of the digital camera.