Fortress built to guard the entrance to Mahon Bay - substantial underground tunnels...

This is still part of a military site - so visiting houts are restricted

The guided tour around this castle ruin takes a couple of hours, but it's one of the most interesting and detailed tours on the island. The fortress was destroyed by the Spanish in 1782, whilst on the tour you'll learn about the history of many invasions, see and walk through lots of underground tunnels and admire the views of Mahon harbour and La Mola.

Tip - The night visits with Flame Torches is super atmospheric

See web site for all details