Refugio Antiaéreo Calderón de la Barca

The historic reenactment they offer is really worth it.

An interesting although perhaps too brief of an experience (hence only four stars) as access to the claimed "subterranean labyrinth" isn't available to visitors but is limited to a guided tour of only a hundred meters or so. The tunnel was only opened to tourists in 2010 but according to our guide efforts are underway to open more of the tunnel network. The tour of the tunnel is led by a friendly local guide with an extensive knowledge of the history of the tunnels. The tour is presently only provided in Spanish and without a modicum of understanding it would be difficult to gain much of an appreciation of the site's features and significance. Although you are required to don hard hats, passage through the tunnel is on a well constructed path with ample lighting making for easy walking. The tunnel is not large so those that find small places uncomfortable might want to stroll the streets of Cuenca instead. Tours are limited in size and only one or two are given each day. The schedule varies according to the day of the week. It is best to make reservations early in the day. Book a spot at the city's tourist information center in the old town for a place later in the day. Entrance to the tunnel is not at the tourist office, but directions are provided when tickets are purchased. A small sign marks the plain steel door entrance in a rock wall just across the street from 87 Calle Alfonso VIII. Allow yourself a little bit of extra time to find the slightly obscure entrance before the scheduled starting time of the tour. Once everyone is inside the tour starts and the door is locked.

Currently closed for maintenance. Not sure when back open.

A tunnel where only 40 people are allowed in at once. You get a large history lesson as to why the tunnel exists and it was a very interesting experience. You will receive hard hats to enter the tunnel and walk through 100m of a cool underground passage way used in the Spanish Civil War. A tip would be buy tickets more than 90 minutes in advance if you really want to check out the tunnel!

They recreate an authentic scenario in which they make you feel like a real air attack. Highly recommended.