remaining interiors for the Tower of Serpents were constructed in an abandoned hangar at Torrejón Air Base. A full-scale, version of the tower was built in the hangar; this model was used to film Conan and his companions' climb up the structure. The crew filmed several exterior scenes in the countryside near Madrid; the Cimmerian village was built in a forest near the Valsaín ski resort, south of Segovia. About one million pesetas ($12,084) worth of marble shavings were scattered on the ground to simulate snow. The Wheel of Pain scene took place in the province of Ávila. Conan's encounter with the witch and Subotai was shot among the Ciudad Encantada rock formations in the province of Cuenca. Most outdoor scenes were shot in the province of Almería, which offered a semiarid climate, diverse terrain (deserts, beaches, mountains), and Roman and Moorish structures that could be adapted for many settings. Conan's crucifixion was filmed in March 1981 among the sand dunes on the southeastern coast of Almería. The Tree of Woe was layers of plaster and Styrofoam applied onto a skeleton of wood and steel. It was mounted on a turntable, allowing it to be rotated to ensure the angle of the shadows remained consistent throughout three days of filming. Schwarzenegger sat on a bicycle seat mounted in the tree while fake nails were affixed to his wrists and feet. The scene in which Valeria and Subotai fought off ghosts to save Conan and the final battle with Doom's forces were filmed in the salt marshes of Almerimar. "Stonehenge-like ruins" were erected and sand piled into mounds that reached . The changes to the landscape attracted protests from environmentalists and the producers promised to restore the site after filming was completed. The Temple of Set was built in the mountains, about west of the city of Almería. The structure was long and high. It was the most expensive of the sets, costing $350,000, and built out of various woods, lacquers, and tons of concrete. Its stairway had 120 steps. Milius and his crew also filmed at historical sites and on sets from previous films. Scenes of a bazaar were filmed at the Moorish Alcazaba of Almería, which was dressed to give it a fictional Hyborian look. Shadizar was realized at a pre-existing film set in the Almerían desert; the fort used for the filming of El Condor (1970) refurbished as