Here the full list of countries without any mask rules or recommendations as of today and where masks are not cultural (Japan has no mask mandates but everybody wears them anyway)
Sweden
Sudan
Turkmenistan
Yemen
Fiji
Solomon Islands
Comoros
Samoa
Tonga
Various small islands in the Pacific
San Marino
Eritrea
Palestine
Syria
Greenland

I hear Syria and Yemen are great spot for Winter. Greenland too.