_Cache In Trash Out® (CITO) is an environmental initiative supported by the geocaching community. Since 2002, CITO has helped preserve the natural beauty of cache-friendly spaces. In that time, more than 363,000 people have volunteered at 18,000 CITO events. _
The park I hosted this in looked pretty clean at first sight, but it was pretty impressive what 15 people managed to dig up in an hour -- 10+ full bags of garbage, old stuffed animals, a couch and office chair hidden in a tree, and more
