As Percy says in The Lightning Thief, the cabins are arranged in a U-shape, with two cabins at one end, and five on each side. Odd numbers are on the left side, even numbers on the right side.
Cabin #1. It is big, made of pure white marble, with columns in the front. The doors are made of polished bronze, designed so that lightning bolts seem to streak across it when looked at different angles.
Cabin #2. Hera's cabin is also made of white marble, but the columns are slimmer, and the structure seems more graceful. Pomegranates and flowers decorate the columns, and images of peacocks are carved into the sides.
As Hera is the goddess of marriage, she doesn't have any demigod children.
Cabin #3. Though long and low, it has a sturdy build, and is made of gray stone, embedded with coral and seashells. The inside glows like abalone, and has the scent of the ocean. Tyson, a Cyclops and half-brother of Percy, decorated the interior with water-filled vases of sea anemones and glowing underwater plants, as well as a herd of miniature bronze hippocampi hanging from the ceiling. Also, there is a water fountain used to send and receive Iris messages. It was given to Percy as a present from his father.
Cabin #4. Demeter is the goddess of agriculture. Her cabin has tomato vines on the walls along with a ceiling made of real grass.
Home to the Demeter campers.
Cabin #5. Bright Red (painted poorly).The roof is lined with barbed wire. There is a stuffed boar head (the symbol of Ares) hanging above the door.
Clarisse, a bully and enemy of Percy, lives in this cabin.
Cabin #6. In the 5th book, it mentions it was filled with bookshelves and tables with sketches of buildings and battle plans covering them, while the beds are pushed aside as though sleeping doesn't matter that much. The cabin has walls of gray granite. An owl statue seems to follow the campers.
One of the more important Atheneans is Annabeth. She is a very major character in all of the books and a constant companion of Percy.
Cabin #7. The cabin is described as being pure gold.
Cabin #8. In the Ultimate Guide, it seems to be made entirely out of silver. In the first book it is mentioned that 'it started to glow silver as the sun set.'
Cabin #9. Described as looking like a small factory. Has dual smoke stacks. It has this look because there are forges inside since their father is the gods blacksmith. Most noticible child of Hephaestus is Beckendorf. He is described as being able to make any thing with metal. He dies on a mission to destroy the "Princess Andromeda" in the Last Olympian.
Cabin #10. Does not say much. In the Ultimate Guide, it has purple pillars, checkered floors and a blue roof. It is a safe bet that there were a lot of mirrors, as Aphrodite is the goddess of love and beauty.
Cabin #11. Described as having chipping brown paint on the walls. It has a cadacus above the door.
It is allways over filled because their father is the god of travelers, so they host all the undetermind campers.
Cabin #12. Not much said about it, though it looks like a better maintained Hermes Cabin in the Ultimate Guide. There are only two campers mentioned who stay in the cabin. They are the twins Pollux and Castor.