Fort Lytton Military Museum

Contains over 2000 items which are found throughout the park including in 5 buildings, 6 gun pits, 2 shelter structures and several open air locations. Admission to the museum is free, although two of the buildings (the submarine mining building and the black powder rooms) can only be accessed on guided tours. If there's a particular section that can be said to be a "must", the Old Dining Hall section contains 10,000 artifacts pertaining to Queensland's military history.