I began to geocache with my daughter just to have time with her. Then, I discovered that I really enjoy it. Go to geocaching.com. There is a free app to use on your phone. You need a username with which to sign the pieces of paper (logs) found in the caches, and the user name is also what you register with on the geocaching website. Another excellent app for both iPhone and android phones is Cachly--which has a modest price. With both of these apps, you get maps with the cache locations, descriptions of the caches, and "activity"--the log notes of the people who have found the caches. Geocaching is so much fun. It gets you outside, you discover places that you never knew about, you find very interesting facts or history about different locales, and there is an enthusiastic geocaching community to become part of. Have fun!