Caches, for U.S. States NY - RI, that require you to find a certain number of other caches that meet specific criteria (plus a few exceptions.) Difficulty of the task varies.
See my profile for additional U.S. Challenge Bookmark Lists
Help me keep it up to date by suggesting additions or corrections - Email me or rate the list.
Last updated 03/15/2013
About Bookmark Lists
A bookmark list is a user defined collection of listings. They can be used as to do lists, watch lists, a way to organize listings you find, or whatever you decide. You can keep them private or share them with others.
Bookmarks can be added on the page for the listing or on this page using the waypoint name.
Bookmark names may be different than the actual listing. Click on the listings to see the actual names.