Fort Rinella, located in Kalkara, Malta, is a unique historical site housing the world's only surviving 100-ton Armstrong gun. While you can explore independently, a guided visit with its captivating historical re-enactment shows, demonstrating Victorian-era military drills and firing smaller cannons, is highly recommended to fully appreciate the fort's significance; these shows are often included in the entrance fee. The fort, an old fortification, may present accessibility challenges due to uneven terrain, stairs, and narrow passages, making it difficult for those with severe mobility issues or wheelchair users. Open generally year-round, it's best to check their official website for seasonal variations in opening hours and re-enactment schedules. An adult entrance fee typically ranges from €10-€15, and a visit, especially encompassing a guided tour and show, usually lasts between 1.5 to 2 hours. Other insights include wearing comfortable shoes for walking on varied surfaces and considering transportation to this somewhat secluded location.