You don’t even have to leave home. Close your eyes and envision it. This is your mind’s eye.
You could roughly translate koselig (pronounced “koosh-lee”), as “coziness,” but that leaves out crucial components of it, like enjoying the company of others and a connection with nature. There’s no direct English translation, but there are regional equivalents such as the Swedish “mys,” the Dutch “gezelligheid” and the most well-known of these, the Danish “hygge.” (pronounced “hoo-gah”)
Here’s one book on it