All castles in Heroes 3.

But one can't deny that Barbarians develop much faster: Orcs, Ogres, and Cyclops don't need buildings for their creatures, and Hydras only need the Gorgon's building! Also, the creature ignores part of the Hydra's defense and deals significant damage, while the Hydra also attacks creatures, and it's more expensive! The creature defeats an Archangel one-on-one – I personally verified this!