Back in September of 2013 I visited a great Mission in Goliad (and apparently forgot to hit publish on the posting). If you haven’t been to Goliad State Park yet I recommend adding it to your list. This site combined with its neighboring historical sites make for a great day trip for anybody.
The mission has been beautifully restored to it’s 18th century condition.
For reference, here is a picture of the 2004 condition.
An interpretative guide is provided on the Texas Parks and Wildlife site.