recomend a luxury hotel with an easy access 25 (or 20+) pool?

[RehabbyAbby]

I need to swim for rehab to improve fitness and would like to stay in a hotel that has a good sized pool for laps (preferably 25m but nothing shorter than 20m). I'd like to find a hotel (can be anywhere - UK or abroad and don't care if it's indoors or outdoors) that is easily accessible from the hotel rooms - not one that involves a long walk down endless corridors, up and down stairs to an obscure annex to a hike to an outdoor spa centre or down flights of stone steps to an outdoor pool.

I want a really easy access to/from the room to the pool and would like to spoil myself with a bit of luxury.

Any suggestions please?

Edited to add: I'm not averse to spa you can stay at either. Any recommendations for ones with hydrotherapy pools also welcomed. Thanks.

Have a look at Hotel Mix in Brussels - it has both an indoor and outdoor lap pool and about 9 saunas plus a huge gym. Not super luxe 5 but decent 4 and a little kooky because it’s an old insurance company headquarters building. Lovely breakfast too.

Thanks @Alljan - do you know or remember what the access to the pools was like? I'm particularly keen to avoid stone steps.