In Ubuntu (and other linuxes), your 'home' folder (generally know as
$HOME) exists at the path
/home/<your-username>/, and will, by default, contain a collection of folders, including one called Public.
If you open the file manager at
$HOME, then it will open in this folder.
Once there, if you press Ctrl+L, you should find that the full location that you're currently viewing is shown in the location bar.
From a terminal, you can also enter
echo $HOME to find out the path.
It's also worth noting that on Linux, files/folders that start with a '.' are considered hidden, and so the
.wine folder won't appear in the file manager's listing unless you show hidden files.
You can do this by pressing Ctrl+H, or from the View menu > Show Hidden Files.