Steve W.
Google
Our main reason for being in the area is the SEO reserve of el Planerón, where we lead tours to see birds such as Dupont's Lark, Mediterranean Short-toed Lark, Lesser Kestrel, Spectacled Warbler, Pin-tailed Sandgrouse, Black-bellied Sandgrouse, Stone Curlew, etc. However, it's a nice short stop to stroll around the ruins of the old town, even though of course the history surrounding it is not so "nice".
Once I brought one of our Birding In Spain tour groups on a guided audio tour of the ruins. There was a lot of detail about the battle for Belchite, which they couldn't really put into much contect (birders from the USA ). The experience was OK, but not in my opinion a "must-do". Birders might be interested to note though, that in and around the ruins you can see a good variety of birds, including Blue Rock Thrush, Crag Martin, Black Wheatear, Rock Sparrow, Red-rumped Swallow, Sardinian Warbler and even the odd Golden Eagle.