Olmec's Lair consists only of one level, 3-1.
The lair is tiered, with three layers of solid brick with a pool of lava beneath. Each layer of brick is 7 tiles deep. A sub-area can be found here, containing the Ankh.
On the very right side, there will be a ladder up to a platform, upon which Parsley, Parsnip, and Parmesan will appear if they have been rescued. One will be given an item depending on how many they have rescued; one will give the player a rope pile, two gets one a bomb bag, and all three will net a bomb box.
To right of level 2, the entrance to the Tide Pool can be found, marked by the three Crabs around it. A ladder is present as well, allowing the player to climb up on top of Olmec's head during his second phase.
A massive lava lake is just under this level, with multiple entrances just above it. These entrances do not have platforms, forcing the player to defeat Olmec in order to use the top of his head as a platform.
This sub-area is largely barren, with the occasional Scarab, piece of treasure, Bat, or Skeleton. The Ankh can be found at the very top, along with a coffin containing the unlockable spelunker Manfred Tunnel. To the right of the Ankh is an exit leading back to The Three Sisters can be found along with a crate guaranteed to contain a parachute.
Note that in Olmec's Lair, angered Shopkeepers and/or an angered Tun will never spawn here. Despite this, the player will still lose a sin point for completing the level, making it easier for the player to attain forgiveness from the Shopkeeper's Association.