Howto do mod redwrite ignore

Hello,
I got mod rewrite working. I have it set to /var/www so it the main thing you see. But, I had old directories that I still want to acess but mod redirect redirects them to wordpress. Is there a way to make mod redirect ignore a certain directory, or even better ignore all directories that currently exist?

Here is my current .htacess

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress