Dwejra lies on the western coast of Malta's sister island Gozo. The rock cliffs are especially rugged and picturesque here, with various spectacular natural attractions, like the "Inland-sea" lagoon, the blue hole diving spot and the "fungus rock" island. The best known attraction however, the "azure window" rock arch, has collapsed and vanished without much trace. The area is still a major tourist stop, with lots of people wandering around the rocks making selfies, so don't expect some kind of wilderness experience. Especially the inland sea lagoon is totally surrounded by quays and tourist bars, and is not really beautiful to look at. As often, you can escape the tourist hordes by venturing further outside. Wandering along the cliffs can be quite rewarding, and there is still much beauty to be found.
As a WHS nomination, the site has some problems. The loss of the azure window makes the site less iconic. More importantly, the general uniqueness is questionable. There are a lot of rock cliffs around the world, and many are beautiful and full of rare plants. The nomination text emphasizes the rareness of the vegetation, but I am not convinced. It doesn't help that the most prominent plant, the Malta Fungus, turned out to not be as endemic as thought. One more problem of the nomination is the quite similar tentative entry of Malta named "Coastal Cliffs".
All in all, I would rate the site in the category: Very nice, but not special enough for a WHS site. But I have generally a problem to judge natural sites. Visited in April 2019. Importance 3/5 Beauty 4/5 Uniqueness 2/5 Environment 4/5 Experience 4/5