Giverny - Monet's garden. I visited a couple of years ago and it's an amazing place.
Cornwall - the St Ives and Newlyn Groups last century and a current really active lot now - one favourite is Kurt Jackson but there are lots of others, You could google for them - also look at The Great Atlantic Mapworks Gallery online - lots of exciting contemporary work to see.
Cornwall is beautiful.
Scotland - the Scottish Colourists last century and the current artists still influenced by them - lots of exciting paintings to see if you google Scottish Colourists (please not correct spelling of colour!!!!!

not the US version or you won't find them!)