The Tomb of Markalos

From the description: The Tomb of Markalos is being opened. Workers have dug a hole into the hillside almost 12 feet deep to reach the entrance to the tomb. A wooden ladder provides access to the bottom of the pit. A full action must be spent to climb up or down the ladder in combat. The entrance to the tomb is a stone slab, flanked on either side by two crumbling cone-shaped pillars. The tops of the pillars almost reach ground level and are capped by two badly corroded bronze bowls.