I've had the free stopover hotel with Emirates in Dubai, but because there were a large number of flight delays at the time (Emirates had grounded their A380s), we were given the Premier Inn by the airport, but it's the only Premier Inn I've seen with a rooftop pool.

For Turkish, please check the info here, and check that the message at the top of the page no longer applies.

https://www.turkishairlines.com/en-i...ghts/stopover/

Turkish also offer tours of Istanbul for daytime stopovers, but that page has the same covid message, so I'd definitely get that checked out with the airline. https://www.turkishairlines.com/en-g.../touristanbul/