https://steamcommunity.com/sharedfiles/filedetails/?id=2792149317
https://steamcommunity.com/sharedfiles/filedetails/?id=2725762502

These are two of my favorite portal hubs. They will light up only when you step in front of them. And they are both separated from my base. So i need only one portal in the base that will teleport me to the hub where i can choose where to go next.
It is a good idea to make portal hub on a small island far away from the mainland and make it almost raid proof. If there is not enough land around it, enemies will not be able to spawn. Well, some of them like bats and drakes will, but trolls and other big bad guys will not :)