Mountain Olympus
http://marvel.wikia.com/Mount_OlympusThe home of the Olympians and the Titans who allied with the Olympians in the Great Titan War described in the Titanomachy. There are multiple ways to get to the pocket dimension of Mount Olympus, the easiest way would be to travel to Mount Olympus and to create the dimensional rip there that would take you to the dimension parallel to Earth. There is also a gate to the Underworld for easy travel from Hades's domain which is now fused with the other Hells and Olympus, though a dimensional rip also has to be created to travel though every time you go there and back. An artificial gate was created between Asgard and Olympus when they made an alliance after a war they had fought in the past because of Odin and Zeus's sons starting it. There also seems to be a gate that from Olympus takes you to where the Olympians claim to originally be from. There are other gates but these are the only known ones known by even the most knowledgeable individuals outside of those who live on Olympus itself.
One can not simply walk into Olympus, the person must use high levels of magick at one of the specific locations with the knowledge on the specific spell to get to Olympus or be with someone who opens the gate for them. The pocket dimension is cut off otherwise to demons and the dead in the underworld along with humans on Earth. All Asgardian Pantheon gods know how to get in due to their mutual peace.
(( Note to innocent: Magick is the real life term for it because the k was added to separate energy manipulation through thought with the kinda magic that is simply deceptive tricks you see in Vegas. Also I really hit that it's a pocket dimension that isn't just open so people don't just so random mob bosses like Black Mask aren't walking in there. Especially since no one is controlling the other Olympians but the fact is that all of them lift 15+ tons (girls) and guys lift like 40+ tons each usually. Poseidon, Ares, and Hades lift 75 tons+
This is all without augmenting their power with the magic they have (though Ares's magic is very limited)
Point is, I know some people will probably run in acting all smug because the other gods who could easily smite most characters aren't being played by users and I don't want Zeus to have to fight every individual that comes in. Unless for example you role play as the Olympians minus Zeus just as you are the guys at the Iceburge Lounge. ))
"innocent little Roxie"]