I like Challenge Caches, and use the TOOLS - CHALLENGES page frequently to look for them.
Regardless of which of the 2 currently available tools I use, the 1 thing I cannot currently do is filter out ones I have already found.
The List version of the tool is limited to 100 Tags, but not as useful as it could be if half of those are challenges you already have completed.
The Map version gets visually clogged with the ones you have already found, especially when they are in close proximity with ones you haven't yet completed.
Can we have the ability to filter out 'ALREADY FOUND' please?