Hello and welcome,
I also agree that neither of these places are great place to be social/exercise/explore, which all submissions must meet at least one of. A cancer society is usually a non-profit providing support to those facing cancer, and a hospital directional sign is letting people know how to get around the hospital. Directional signs are not eligible, per this clarification:
Now, if the cancer society does provide a space for those to gather for events or other social activities, it may be eligible, but if it’s just a non-profit supporting those with cancer and nothing else, then it’s not eligible.
It’s encouraged to review the Wayspot Criteria to know what may or may not be eligible. Another great place to check out is the Criteria Clarification Collection, which covers some of the most discussed POIs and locations. And if you have any questions about whether or not something may be eligible, feel free to post about them in Nomination Support and we’ll be glad to assist.