These posadas in Colonia del Sacramento, Uruguay, are an excellent choice if you are looking for a nice place to rest, and walk around the barrio Historico. I recommend doing that at night, it is safe, lovely, and a little dark, as city lights are not allowed as the Barrio Historico is a World Heritage Site.
Damian, borravinowinetours.com
Posada Las Terrazas
https://www.posadalasterrazas.com/
Charco Hotel
Posada Plaza Mayor
https://posadaplazamayor.com/es/
Posada Don Antonio