How to see the different Ruby on Rails svn tags

I was curious to see if there was a new Release Candidate of Ruby on Rails, so I went looking for a new tag named rel_1-2-0_RC3. So I was wondering how you browse tags in Trac. It’s pretty easy – just append /tags to the URL of the Trac svn browser like so:
http://dev.rubyonrails.org/browser/tags