Already at Mérida's admission in 1993, there were 20 other (Mediterranean) Roman heritages inscribed on the List. And many more followed, currently, I count 28 of them and even last year one was added (Serbia's Gamzigrad-Romuliana). "Ancient Rome" is one of the most common site categories. One just wonders how many is enough? My personal favourites so far have been Rome, Pompeii and the Villa Romana del Casale. Before my trip to Extremadura, I wondered what Mérida has to offer that all the others don't.
Modern Mérida feels a bit dilapidated at first sight: graffiti, poor housing. I started my tour of the Roman monuments at the amphitheater and the theatre. For 10 Euros you get an entry ticket to these and the other important sites in town, which can be used over several days. Good value I think. The prize piece is the ancient Roman theatre, which could seat 6000 people and still has a formidable stage with marble columns and statues (although these are replicas).
Close to the theatres is the Roman Museum, which is very much worth visiting. This is where my initial concern faded away. The accomplishments of the Ancient Romans continue to amaze. Remember that the Civilization of Ancient Rome existed really early in history - more than 1000 years before Angkor Wat or Machu Picchu were constructed - and that so much is left, both physical and in writing. There's a well-presented exhibition here about the local Roman road system, the Via de la Plata. Entry to this great museum is only 2.40 Euros (and free to minors, seniors and the unemployed!).
The numerous Roman monuments of Mérida are scattered around the modern town. Their quality lies in their ensemble: it would be a great destination for a school trip as you can point out every aspect of life in a Roman city. It shows how they lived (how the rich lived anyway), what they did in their spare time (the theatres, the circus), how they travelled and how they buried their dead. So, Yes, Mérida surely deserves its place among the 28 Ancient Roman WHS.