https://wiki.guildwars2.com/wiki/File:Well_(decoration).jpg
That is the one , but for as far as i know it can only be crafted the Lost Precipice Guilhall so i would like to switch From Windswept Haven Guildhall to the Lost Precipice Guildhall to craft those wells there , but when i would have enough wells then i would like to switch back after some time to the Windswept Haven Guildhall but only if i am absolutely sure that i can place my newly crafted wells there . :)
And yes we are lvl 40 with our GH and have the neccesary upgrades :)