Underground tunnel at Fort Nelson, which was crucial for the fort's defences

Main Tunnel and Underground Galleries

Explore the main tunnel that allowed the garrison to reach important areas of Fort Nelson for its defence.

Here, gunpowder and ammunition for the guns were stored in the Powder Magazine.

How to find the gallery

The entrance to the main tunnel is outside the galleries and may be accessed from the Street.


  • The Royal Armouries is committed to providing appropriate facilities for our visitors with disabilities or special needs.

  • The Royal Armouries museum at Fort Nelson offers a range of facilities: shop, cafe, corporate hire, and caters for group visits and the needs of visitors with disabilities.

  • How to get to Fort Nelson.

  • The history of Fort Nelson, from its origin as one of Palmerston’s Forts to the present day as the home of the Royal Armouries national artillery collection.