The Tower of Refuge, also known as St Mary's Isle, is a small structure built on a tidal island in Douglas Bay, Isle of Man, offering a unique historical and scenic experience. Access to the tower is only possible during low tide, requiring careful planning and awareness of tidal conditions, making it unsuitable for those with mobility issues at certain times. While the site itself is free to visit, transportation to Douglas and any associated tours will incur costs. A typical visit is brief, mainly involving a walk around the structure and enjoying the surrounding views, and is highly dependent on the tide schedule. Due to its tidal access, visits may be seasonally restricted or impacted by weather conditions. Solo exploration is feasible if you're mindful of the tides, but a local guide might offer deeper insights into the tower's history.