Destructible building

Destructible buildings are a new feature in Wrath of the Lich King. These buildings are objects with health bars that can not be targeted or attacked through conventional means. The only way to destroy them is through use of siege weapons, when destroyed they usually leave rubble where they once stood.

Known locations
Destructible buildings can be found in:
 * Strand of the Ancients
 * Ulduar
 * Wintergrasp