Den's Den is an apartment in St Mawes. It's on the first floor of the Beach Hall building, right on the square. You get a view of the harbour and the bay from the main room and one bedroom. It's handy for watching the boats.
It's modern inside and was redone a few years back. Two bedrooms, sleeps four, one bathroom. We take one dog.
You can walk to the beach in a few minutes. The shops, cafes, and pubs are right there on your doorstep. You really don't need to use your car unless you want to.
The St Mawes to Falmouth ferry is a few steps away. It goes right across the harbour. From Falmouth you can get to the National Maritime Museum. You can also get the small ferry over to Place and walk out to St Anthony's Head. That's a good walk.
The facilities are what you'd expect: TV, dishwasher, washer, towels and bedding are included. There's a cot and highchair if you need them. There's a shared garden area too.
For places to visit, the National Trust Cornwall site is useful. So is the Visit Cornwall one.