I'll kick off this thread with today's trip to Harlow Carr, near Harrogate in North Yorks.
It's run by the RHS, in a cold area noted for wind. The area undulates, with a stream, lake, and woodland, as well as a lot of different garden areas. The soil is acid and there are lovely rhododendrons at this time of year. Geoffrey Smith designed the stream garden many years ago, and it's beautiful - lots of candelabra primulas will be out in a few weeks. There's also a large, sloping double herbaceous border, an alpine house, vegetable garden, students' beds and various trial grounds, and a teaching centre.
Here are a few photos - not that many cos it was too cold to take off my gloves!
Tulips - the last photo taken in a garden designed by Dermot Gavin. Not a colour combination I'd use, I think...
Tree paeonies - sorry, not named.