Olympus

Olympus (Όλυμπος in Ancient Greek) is the traditional(ancient) home of the Olympian Gods. It was originally located on Mount Olympus, but, as Chiron explains, it has steadily moved over to the west, following "Western Civilization" over the centuries and is now in the United States of America. Instead of being the physical mountain it is a metaphysical duplicate. This mountain does not connect with the ground and cannot be detected by mortals. It possibly exists in some other dimensions, due to it floating with its great mass over a mortal city undetected. At the top of it is a large city containing the palaces for the Olympian gods and residences for many minor gods and other creatures of Greek mythology.

It is here that the Gods commune, each having a massive throne, which are collectively arranged in a reversed U shape. It also houses some of the minor gods and magical creatures such as the Ophiotaurus. Although it used to actually be located at the peak of Mount Olympus, it is now on the 600th floor of the Empire State Building, having moved with Western Civilization. The only mortal way to get up to Mount Olympus is past a security guard (in the lobby) who won't let you pass unless you have special authorization. Olympus is described as a paradise, with golden buildings and happy people. Along with the Gods lives hundreds of other creatures and beings. The cabins at Camp Half Blood are in the same shape as the thrones.

Most Gods live on Olympus, but a few others prefer to tend to their native kingdoms, like Poseidon, Hades and all cathonic gods and goddesses.

As the seat of power of the Olympian gods it is of vital importance. Should the throne room be destroyed Mount.Olympus would crumble and the power of the gods would be severely weakened making them vulnerable to their enemies. In theory if it were destroyed and the Olympians regained enough strength it could be reformed. In the meantime they would be vulnerable to their enemies. It is unknown how the destruction of Olympus would affect the minor gods. However, Hades thinks he can hold by himself for four years in the Underworld without Olympus.

The Olympians
These gods are the most important and powerful gods. The home of these gods is Mount Olympus.

The Lightning Thief
On his first visit to Olympus, Percy returns Zeus' lightning bolt during the summer solstice and has his first encounter with his father, Poseidon and his uncle Zeus. Percy describes Olympus as making Grand Central Station look like a broom closet.

The Titan's Curse
On Olympus, the gods voted whether or not to kill Percy and Thalia and also to figure out what to do about the Ophiotaurus, (or Bessie, Percy's name for the animal), and Kronos. Once it was decided that Percy, Thalia and Bessie would be spared, the Gods threw a spectacular party.

The Last Olympian
Percy, Annabeth, Thalia, Grover, Tyson, as well as over forty other demigods and many hunters and nature spirits defended Olympus, and succeeded;however it was damaged greatly by Kronos's attacks on the gods' thrones with his scythe. They are later rewarded and Annabeth, daughter of Athena, was chosen to rebuild and redesign Olympus as its official architect.

Trivia

 * Olympus was said to be carried by the Anemoi, Zephyrus.