I visited this WHS in June 2015. I had been wanting to visit this site and I had included it in my personal Top 100 Unesco WHS Bucket List. Well, it certainly didn't disappoint. The main highlight is obviously the aqueduct which is really huge. Yet another Roman ruin/WHS you might think, but what I found special about this site is that it has become an essential part of the modern city. All the city revolves around this unique site and it lies at the heart of the city not at its margins like most other sites. I walked from the middle of the valley (where the aqueduct reaches 3-4 storeys high to the end the aqueduct which actually continues underground. The walk was pleasant and I would recommend walking up the few steps to the Mirador del Postigo to enjoy a great panoramic view of the city and the aqueduct with the Sierra de Guadarrama in the background. The cathedral can be viewed from Plaza Mayor as most other cathedrals in Spain. It reminded me of the Monastery of Batalha with its pointed spires and as you can see from the photo, every morning there are sunrise hot air baloon rides over the cathedral! Should I revisit I would love to give it a try. The third highlight of Segovia is the Alcazar which is worth viewing even from the inside. That said, I enjoyed myself more in the tranquil and pretty Poets' Garden nearby. Before heading back to the city centre, I saw the cathedral tower from another panoramic viewpoint, the Mirador del Museo de Segovia and then hiked down to the mysterious Iglesia de la Veracruz which is said to have belonged to the Knight Templars. I'm very glad to have stayed overnight as I got to visit the place in the morning before day trip coaches arrived from Madrid and then again in the late afternoon when most would have either left to Madrid or would have earlier to visit Avila. This is one of the best WHS Spain has to offer (at least from the 23 I've visited so far).