Plug the Sinkholes

The Scourge are showing no sign of letting up, $N. It's those blasted sinkholes; they connect to tunnels all the way to Icecrown for all we know. Giant undead worms burrow under the ground to create them.$B$BIf there's something years of mining has taught me it's that without support beams, tunnels will cave in easily after an explosion.$B$BTake these explosives and place them at the entrance to the sinkholes up on the ridge beyond the beach to the west. Come back after you've collapsed them.