Take the tour ×  While exploring I've found a tower of glass
blocks coming out of a lake in Minecraft.  tower of glass blocks
out from a lake  As far as I can tell they go up to the top
limit of the world.  It also goes down in to the ground, as you
can see by this quick test dig on the lake bed:  they also seem
to go down in to the water bed  Why is it there? Bug or feature?
Does it mean anything specific?  For Info: I'm using Beta 1.9
Prerelease 3, and have only ever used 1.9pre3 (I'm a very new MC
player, and thought I'd start with the "latest" version), so
this can't be an artifact from map generated by the old version,
for example.  Also I have no mods, tweaks, etc in place - the
game is completely stock.  share|improve this question add
comment  1 Answer  up vote 28 down vote accepted  In 1.9 pre-3
some debug tools have been left on. One of which is glass towers
coming out of the top of strongholds:  Debug Features:    • 1x1
glass pillars to spot Strongholds  If you follow this glass
spire down, you sho