There are many beautiful houses and gardens in Cornwall, indeed far too many to mention them all here.
Certainly the National Trust gardens in Cornwall are all worth a visit particularly if you're a member and there are gardens at Anthony near Torpoint, Cotele near Saltash, Glendurgan near Falmouth, Lanhydrock Near Bodmin, Trelissick near Truro,Trengwainton near Penzance and Godolphin near Helston.
Some of the other gardens worth a mention are:
Caerhays Castle Gardens open from February to the end of May situated in a secluded valley overlooking Porthluney beach with a 100 acres of spring woodland garden.
Trevarno Gardens near Helston is a fabulous garden with woodlands, a lake and a children's adventure play area. Here you can also buy a range of their own soap products made as much as possible from local ingredients.
Trewithen near Probus, St Austell, is another spectacular garden probably at its best during the spring because of its magnificent collection of camellias, rhododendrons and magnolias.
Longcross Victorian garden is a beautiful and idyllic restored gardens stretching to almost 4 acres with panoramic views looking out towards Port Isaac on the north coast.
Mount Edgecumbe is more of a country park with over 865 acres and 10 acres of formal Italian and French style gardens.
The Cornwall Coast Coastal path is one of the most beautiful in England, stretching over 250 miles, from breath taking Atlantic cliffs to sheltered river estuaries, and much of it is accessible to walkers.
For keen walkers, Go for a Walk.com is a good place to start.