Calapia
From Tardis Wiki, the free Doctor Who reference
Calapia was a planet known for its rural charm, beautiful weather and magnificent ruins. It also had several major cities and was home to the Calapians.
The Thirteenth Doctor once visited the planet in the company of Yaz, Ryan, and Graham during a passing of the Death Moon, and were forced to shelter in a bunker on the planet for three weeks. (PROSE: The Shadow Passes)