Create an account and keep track of the benches you've been to. You can either login with Twitter or Facebook to save your list of benches. Remeber to log out again, if you're using a public computer, like in a library or an internet cafe.
No Twitter or Facebook account?
You don't need an account to save your list of benches. We can set a cookie on your computer instead, so that we can save your list for you. (Don't do this on a public computer, like in a library or an internet cafe, only on a home computer, to be safe.)
Afterwards, if you opt to be forgotten (deleting the cookie), your saved benches list will also be removed.