Stardew Valley!! (http://stardewvalley.net/) It's so fun, it's my relaxing game right now.

The story is that your grandfather left you this old farm and you quit your city job and move out to the valley. From there, you kinda play like you want, but you can either farm a lot, go digging in mines, fishing, and then you can build relationships with the towns people. There's a little magical twist too, so it has a little more of a story than, say, Minecraft, but it also lets you play in the world.