I am a cat person, so my answer is lame for most people... the nicest place is my own home...
But if it must not be my house, then I will pick the old house of my grand mother's. It's in the small fisherman town, you can google it - Kaminoseki in Yamaguchi prefecture.
Right now it's more like a ghost town there, less than 2000 people live there.
It's always good to feel well at home :-)
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