Things to do outside!
A significant part of recreational travel is motivated by the possibility to be active outdoors. For example - hiking, cycling and skiing are popular holiday activities.
Unless people live in the middle of nature, there is still travel involved in getting to the location where the outdoor activities are to take place. Questions with this tag may be about the combination of travelling for outdoor purposes. For example, one may inquire about the possibility of taking skis or bicycles while travelling.
Note that many questions about outdoor activities might be appropriate for The Great Outdoors on Stackexchange.