The center of the vergence is within an enormous cenote, an underground natural cavern with a hole at the top and partially flooded by a slow-moving underground river. The dome-shaped chamber is connected to a complex of dangerous, twisting caverns, which are periodically intersected by the equally twisting river. Early visitors reinforced and decorated the dome of the cenote, demonstrating their power with the Force and their ability to carry out the work that was done at the heart of the vergence.
Little of the site's natural rock remains visible in the dome, which was once completely covered with a conglomeration of materials including rock-hard, duracrete-like substance, stone slabs, and intricate masonry. Much of the reinforcment has worn down, and some fell into the waters below it centuries ago. The artificial surface of the dome is adorned with cryptic symbols and stylized illustrations of Force powers in use. Though most of the abstracted subjects are humanoid, some are not, and it is difficult to pinpoint exact species. In places, it is clear that original works have been replaced with later pieces. It is difficult to determine whether the replacements were made to conceal the earlier art or to replace naturally damaged portions of the dome's facing.
The lower potion of the chamber remains mostly in its natural state. A stone walkway encircles the chamber wall just above the typical water level. Regional floods and droughts can cause the water level to vary greatly, though the water stains on the dome seem to indicate it has not risen above three quarters of the chamber's depth. A central, roughly circular stone platform rises just above the normal water-level, directly beneath the opening in the top of the cavern. The platform and walkway are so old and worn that it is difficult to determine whether they were naturally formed or constructed by ancient visitors. At the walkway level are a number of tunnel openings leading to other chambers beyond.