The park was extended in 1999 to include Lytton Quarantine Station which occupied adjacent land.

Fort Lytton continued to operate as a military base until shortly after the Second World War (WW2).

[3] The Lytton Quarantine Station was established in 1913–1914, to accommodate newly arrived immigrants and persons considered to be at risk of causing infection to the general population.

The Visitor and Information Centre (which is also the headquarters of Fort Lytton Historical Association) previously housed the quarantine station laundry.

The museum has a collection of over 2000 items which are distributed throughout the park including in 5 buildings, 6 gun pits, 2 shelter structures and several open air locations.

The Old Dining Hall houses a collection of over 10,000 artefacts pertaining to Queensland's military history.

[6] FLHA is a non-profit volunteer organization which provides free guided tours of the Fort on Sundays and public holidays.