Cromwell's Castle

Cromwells Castle from across the water.
Aerial view of Cromwell's Castle.
View of Cromwells Castle across the water

Free Entry

Open any reasonable time during daylight hours


Tresco, Isles of Scilly, TR24 0QE

Before You Go

Standing on a rocky promontory guarding the lovely anchorage between Bryher and Tresco, this round tower was built after the conquest of the Royalist Scillies in 1651 and is one of the few surviving Cromwellian fortifications in Britain.

Read more about the history of Cromwell's Castle.

Before You Go

How to Find it: Situated right on the shoreline just north of New Grimsby harbour, the castle is only accessible on foot.

Facilities: Refreshments are available from a well-stocked shop just south of New Grimsby harbour.

Please Be Aware: The footpath winds through a hillside of heather, so sturdy footwear is advisable.
There are steep stone steps within the castle's towers.

English Heritage does not permit drone flying from or over sites in our care, except by contractors or partners undertaking flights for a specific purpose, who satisfy stringent CAA criteria, have the correct insurances and permissions, and are operating under controlled conditions.

Dogs: Dogs on leads are welcome.


Plan a Great Day Out

Walk up the hill to King Charles' Castle, perched on the hillside above. Both castles, along with the Old Blockhouse on the east side of the Island, can be included on the six mile circular coastal walk around Tresco.

Call in at the Isles of Scilly museum in Hugh Town, St Mary's where you can discover more about the rich history of the archipelago.


Your support helps in so many ways

Your membership provides valuable support for our essential work, while you can enjoy free access to the beauty and inspiration of our magnificent historic places. 


About us

English Heritage cares for over 400 historic buildings, monuments and places - from world-famous prehistoric sites to grand medieval castles, from Roman forts on the edges of empire to a Cold War bunker. Through these, we bring the story of England to life for over 10 million people each year. The English Heritage Trust is a charity, no. 1140351, and a company, no. 0744722, registered in England.

How We Are Funded

Our target is to become completely self-funding by 2023. Our confidence in achieving this is based on our track record. During the past 10 years, our commercial income has doubled and we have raised nearly £60m in donated income.

  • 66% Self-generated income
  • 20% One off capital grant
  • 14% Government funding
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