I am thinking of Croatia

We went to Split for a day last time we were there and had a wonderful guided tour, including Diocletian's Palace and other places of interest.

We went to Croatia - Dubrovnik - for the first time last June and both really loved it. It is very scenic and clean, though not, I think, an area with many beaches. Mostly people swim from platforms on the rocks - but the sea is very clean and clear. There are several short (and longer) boat trips you can do from Dubrovnik - e.g. to Cavtat (30 mins by boat) and Lokrum (10 mins by boat), both of which are peaceful and lovely. Two sisters in my choir had a holiday in Cavtat last year and they thoroughly enjoyed it.

My neighbours go to Split every year, which is also supposed to be very nice.

That sounds lovely Sunlover

In fact they all sound lovely and I have a yearn to go back again

That sounds really good Sunlover. We went to Montenegro last October and stayed all inclusive. It was so relaxing.A number of trips were offered and all abilities were catered for. It was a Jet2 holiday.
The location was beautiful: hotel by the coast surrounded by mountains. The staff were friendly and English widely spoken.

We did an amazing trip to Croatia last summer. We started in Dubrovnik and cruised along the coast. Breakfast as we set sail each morning and a couple of stops each day. We had 5 lunches and 2 dinners on board. The other evenings we ate out in the town we were docked in. Only 30 people on board. It is one of the best holidays I have had.
One of the ladies I travelled with suffers from MS and she managed all the tours that were laid on. Lots of people just did their own thing or stayed on the boat.
Beautiful coastline seen from a yacht.

Hi grannymilly we had a lovely holiday in Dubrovnik a few years ago, and we also explored a very pretty harbour resort called Cavtat - we got there by water taxi from Dubrovnik.

I searched online for some info about that area and came across this website:

www.silvertraveladvisor.com/review/place/156601-cavtat-two-weeks-in-cavtat-croatia

It depends if you want a relaxing beach holiday and strolls along by the sea or to do some sightseeing; there are some wonderful old buildings although of course some got damaged in the war and have been renovated.
Most of the beaches are pebbly but the coastal areas are flat whereas inland is mountainous.

Some of the islands are lovely - Korcula and Hvar for instance.
There is a sandy beach on Korcula

try Pula on the Istrian peninsula of Croatia,its a lovely city with loads to do and access to beaches and countryside ,or Medulin which isn't far from Pula.We've been to Istria a few times and love it ,its also great for a day trip to Venice if you'd fancy that