Standing stone inscribed with a cross in Gällsta, Vallentuna. Despite the fact that it does not bear any runes, it is listed in Upplands runinskrifter as U 230.
<a href="//commons.wikimedia.org/wiki/User:Berig" title="User:Berig">Berig</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>