Mount's Bay is a bay on the English Channel coast of Cornwall, England, stretching from the Lizard Point to Gwennap Head. In the north of the bay, near Marazion, is St Michael's Mount; the origin of name of the bay. In summer, it is a generally benign natural harbour. However, in winter, onshore gales present maritime risks, particularly for sailing ships. There are more than 150 known wrecks from the nineteenth century in the area. The eastern side of the bay centred around Marazion and St Michael's Mount was designated as a Marine Conservation Zone in January 2016.

Praa Sands, commonly pronounced pray or prah, is a white-sand beach and coastal village in Cornwall, England. It is in the parish of Breage and lies off the A394 road between Helston and Penzance. Formerly serving the local mining industry, it is now mostly a tourist-orientated area. The beach is popular with surfers and walkers. Towards the south eastern end of the beach is a WW2 Type 24 pillbox. Originally this was constructed on top of the cliffs but it has been subjected to coastal erosion and has settled down onto the beach.