catch all 26 unknown and go through the ruin maniacs cave when you reach the end you will find the 2 rarest unknown ? !.
After you have collected all the Unown excluding the "!" and "?" ones, the Ruin Maniac on Route 214 will uncover a room while he is excavating. In this room you can encounter the "!" and "?" Unowns and access the top door of the Solacean Ruins.
I am not sure if you mean the Unown wall, but there are Unown ruins (called Solacean Ruins) to the right of Solacean Town
why don't you go to solacean ruins to get a fire, water and thunder stone
Unown, found Solacean ruins, directly east of Solacean Town.
spend hours in the solacean ruins
solacean ruins i think
it is all the unowns telling you something
isn't that obvious its in solaceon town on the right
You go right from Solaceon Town, go down a few ledges, and you see a cave entrance. Enter, and, KABOOOM! you're in Solaceon Ruins
According to bulbapedia: on the way to the Unown Ruins there are 2 houses, in the second house there will be a woman with a sticker case.
In Pokemon heart gold & soulsilver you must complete all the puzzle and have unlocked all the areas before you are able to get all the unknowns
you have to strategically use strength to place the boulders on top of the darker part of the ground.