The Gunpowder Store in Sandviken was built in 1807 for the purpose of storing gunpowder for the fortification at Hegreneset. The building has strong walls and a light roof, designed to minimize damage in the event of an explosion. Its original location in a ravine, surrounded by mountains, helped to protect the building from external influences.
Today, the Gunpowder Store is used as an office and is well maintained. The building has historical significance and is part of the defenses that were built after the Battle of Copenhagen. In addition, the nearby Bunker Hegrenes is known for its use during World War II. The Gunpowder Store is also mentioned in Amalie Skram's literary work about the Hellemyrsfolket, which further emphasizes its cultural and historical value.