<em>I can't find the information that should be in your question but I will give you some useful information about it.</em>
Geocaching is an activity where players are looking for treasures that are hidden and in that way, they are also exploring new locations.
They can use GPS receivers to track the cache.
Since the cross-country track racing and synchronized team swimming are done in a group of many people that are swimming or running together I would say that those activities aren't similar to geocaching. Both of them had their route and they are not able to explore new or interesting locations.
In competitive freestyle skiing, people can do freestyle activities such as Aerial skiing or Mogul skiing.
I think that the most similar activity to geocaching is remote-controlled car racing because this activity is including technology like geocaching.
Because it is one of the geocaching activities. What is geocaching? <em>See the explanation below!
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Explanation:
Geocaching is an activity carried out outdoors and involves a Global Positioning System or navigation system that is determined by the location of its coordinates throughout the world.
