The Runelords will Rise
Once the home of a particularly vicious goblin tribe, Thistletop is actually the remains of a portion of a massive Runelord defensive tower network.
Destroyed in Earthfall, Thistletop’s network of tunnels, rooms and passages is believed to have served as the control center for a magic fire tower, which would focus and emit powerful beams of light which would blast enemy dragons from the skies or immolate enemy troops on the march. While much of this is speculated, little remains of the power needed to perform such feats.
The rooms and tribe were cooped by Nualia Tobyn on her quest for vengeance against Sandpoint. The party successfully killed the Goblin Chief as well as several of Nualia’s party during the delve. It is unknown if Thistletop remains uninhabited, as local Goblin tribes continue to thrive and the protection provided by the stone caverns would allow such tribes to live in relative safety from adventurer attacks or raids by other Goblin tribes.