Plymouth History | The Hidden Fortress on Plymouth’s Doorstep: Inside Mount Batten Tower

5 June 2026

Thousands of people look across Plymouth Sound every week and see the small stone tower standing proudly on the Mount Batten headland. Yet few realise just how remarkable the historic structure is inside.

Mount Batten Tower has stood watch over the waters of Plymouth Sound for centuries, a quiet but powerful reminder of the city’s long relationship with the sea. Perched above the shoreline, the compact fort once played a vital role in protecting the harbour and monitoring ships entering the Sound.

The tower is believed to date back to the mid-17th century, a period when coastal towns strengthened their defences during the turbulent years surrounding the English Civil War. From its elevated position, soldiers stationed at the tower could observe vessels approaching Plymouth and be ready to defend the harbour if needed.

The roof platform was designed to hold up to ten cannons, giving the tower the ability to command the surrounding waters. In reality, historical accounts suggest that only six guns were ever mounted there.

Today two historic cannons remain at the site. One is a British gun, while another is believed to have come from a shipwreck off the coast in Plymouth Sound many years ago. They offer a glimpse into the tower’s original defensive purpose and the long maritime history connected to the waters below.

Inside, the tower reveals how the small fort would once have functioned. The upper floor contains a more refined room with an ornate fireplace, suggesting it may have been used by higher-ranking officers stationed at the site.

Below it is a more basic level, likely used by the soldiers responsible for operating the guns and maintaining the position. Beneath these rooms sits a very small cellar space, while a narrow stone staircase winds tightly through the tower, leading up to the roof where the cannons once stood guard.

From the top, the view across Plymouth Sound is extraordinary. The harbour, the coastline and the historic defences around the water can all be seen from the same vantage point that soldiers once used to watch the horizon centuries ago.

For many visitors, the experience is a reminder that remarkable history is not always found in distant cities or famous landmarks abroad. Sometimes it is right on our doorstep.

Mount Batten Tower may be small, but it stands as one of Plymouth’s most fascinating historic structures — a quiet sentinel above the Sound that has been watching over the city for hundreds of years.

Photographs and Video © Wayne Perry / Plymouth Post