The Temple of Sand, commonly referred to simply as the desert temple, was a legendary temple that lied in the desert east of the Dead Sea that was rumored to harbor the Chalice, an ancient artifact similar to the Pieces of Eden thought to possess the power to unite all factions of the Third Crusade. By the time of that war, much of the site was submerged under the desert, though many of its ruins still protruded from the sands. Three keys were required to gain access to this temple.
In spite of the site's shrouded nature and the specific conditions for entry, explorers throughout generations had managed to penetrate its walls to dabble at its treasures, only to be killed by traps set for them below.
As the vault for the elusive relic known as the Chalice, the temple became a critical target in the war between the Assassins and Templars in 1190. That year, the two factions embarked on a massive hunt for the keys to the temple, and among the Assassins, this quest was principally assigned to the elite agent Altaïr Ibn-La'Ahad. Although the Mentor Rashid ad-Din Sinan had informed Altaïr that the Templars had already captured the Chalice, the Crusaders' desperate search for an entry into the temple implied otherwise.
An elderly man who had visited the temple prior to this conflict was waylaid by Templars and detained at the Templar Hospital in Tyre where its commander, the doctor Roland Napule subjected him to gruesome torture for the keys. One had already passed into the hands of the Romani dancer Fajera, and another into the possession of Basilisk himself, but this old man still held the remaining key. With the assassination of Roland, the man granted Altaïr his key, and the Assassin, who had already collected Fajera’s key, was one step further towards opening the temple.
Once Altaïr had stolen the last key and the map to the site from the Templars, he journeyed to the temple. Among its outdoor ruins, he narrowly avoided tumbling underground when, just before an exposed treasure chest, the earth gave way to the cavernous chambers below. After recovering this treasure, he used the collapsed ground to slide into the underground temple where he immediately ran into the first of many Crusaders he would face within the ancient complex.
Despite having lost all keys and the map to the Assassin, the Crusaders had found a way into the temple, occupying its premises before he had even arrived. As a result, Altaïr had to be cautious of the patrols throughout his exploration in addition to the temple's deadly traps. After traversing through the grotto and into the high reaches of the temple, he overcame the great champion of Basilisk that had been posted to guard the antechamber to the shrine.
Within the grand treasure room, Altaïr believed that his quest was at an end only to be proven wrong when he opened the shrine to find it empty. At this point, he was ambushed by Basilisk and his captains, who revealed that the Chalice was not an artifact, but a woman. As Basilisk promptly left afterwards, he failed to witness Altaïr defeat his knights with ease. Upon closer inspection of the vacant shrine, he found himself suddenly transported outside of the temple, in the wake of a rapidly advancing sandstorm.
While the Assassin ultimately escaped the sandstorm by fleeing to a nearby shelter, much of the ruins was ravaged in the disaster.
At the time of the Third Crusade, the majority of the complex lied underneath the desert, with only scattered remnants of ancient pillars jutting above ground. The temple was vast; its colossal structure extending enormous depths below the surface. When the Crusaders entered, they found the skeletons of past explorers strewn about throughout its perilous corridors, killed by the temple's myriad of booby traps. These traps consisted of great swinging axes, pits of spikes, and giant stakes that spontaneously struck out from the walls or ground, some triggered by specific floor panels—generally marked with the bas-relief of sphinxes—where the slightest misstep could spell certain doom. True to its region, the architecture was Mesopotamian, with the engravings of lions and sphinxes lining some walls. Even so, much of the pottery found within exhibited the black-figure painting common to the Greeks. Though a great part of the underground complex was intact in 1190, much of it was in decay; many columns and floors had collapsed, while others would crumble under the merest step by a traveler. Despite lying underneath a desert, it harbored an abundant water supply and a system of pipes that served either as sewage or irrigation. Due to its dilapidated state, streams of water trickled down through cracks in the walls and ceilings.
At the very bottom of the temple was a cavernous grotto by which the site was rooted. This grotto was flooded by mystifying waterfalls that streamed down from the highest levels of the subterranean complex. One route to the temple's shrine, which Altaïr had taken, necessitated ascending towards its level from a long staircase originating from the grotto itself. The entrance of this stairway was barred by a gate composed of stalactites and stalagmites, opened only by the activation of two mechanisms some distance from each other: one that controlled the stalactites, and the other the stalagmites.
The great treasure chamber was less a room than a fire pit of mammoth proportions. Its vast, vaulted chamber was hundreds of meters high and deep, such that it appeared to be an abyss from which a perpetual firestorm raged. Steady streams of fire flowed up along the great wall. Almost wholly empty, the chamber’s only structure was a central platform attached by bridges on four sides leading in from the four entrances corresponding to each cardinal direction. On this lone platform—ringed by four torches yet no railings—sat the shrine purported to hold the Chalice, a plain golden box topped by a pair of harpy-like figures facing one another. One of the entrances of this room was similarly wrought entirely in gold and could only be opened after a specific pattern of steps was taken on the floor of the antechamber.
- Although the entire first act of the game stresses the necessity of the three keys to the temple in order to open it, Altaïr is not shown to rely on them when he finally enters the temple. Instead, as he arrives at the site, the ground spontaneously caves-in beneath him, allowing him entry. Curiously enough, the Crusaders were also shown to have been able to enter the temple despite having lost the keys to Altaïr.
- It appears that Altaïr was magically teleported outside the temple upon inspecting the shrine, but the game does not explain how exactly this occurred.