So I am noob, have no idea what vaal ruins even is but I basically openend a portal but did want to finish the zone and open waypoint on the next zone before going there.
I spent 5-10 more minutes to finish zone and open next zone waypoint but when I got back there is no vaal ruins portal. It does show on the map but there is nothing there just the slab where it should be.
How to get the portal back?
Don't stress, sounds like you are in the campaign still. Pretty sure in the campaign it pops up in every single map so you have plenty of chances. Once you get to endgame it unlocks to take you to the temple every 6 maps.
There is a new one in every zone/map so either progress to the next area and find the next one or go to your map and there should be a column of quick travel options on the right hand side for hideout/sekhemas/chaos/well of souls/vaal ruins and it's at the bottom of this list. That is for console though so it may be different on pc but there is a quick travel option for you to go there at any time, there might also be a chat shortcut to take you there just the same as /hideout does.
You can just use a waypoint to go to the Vaal Ruins
Just a man and his crossbow. Mercenary is duelist persona tuned up to 11 and I love it.
If only there were any clues. Could be anyone!
Oh hell ywah!