Here. I sorta made a world for the pile of possible places to go.
Isolation:-Journey: The magical rites required to rend the barriers between worlds are not particularly strenuous in certain parts of this world, allowing semi easy access to the infinite other multiple realities and fairly regular journeys too and from, in fact, most of the difficulty lays in survival on the world itself, as the places of entering and exiting are not particularly suited for survival. Leading to a lengthy physical journey though trying lands to reach the proposed area of settlement, nothing that can't be done with the appropriate preparation.
Power: -Comfortable: The dangers inherent in the purposed world have kept most colonization efforts from succeeding thus far, but the riches available for harvest in this world are quite a temptation. And with the knowledge that a large number of powerful wizards will be embarking on this journey as well as resulted in a non minor interest in investing in the well being of the expedition by certain less risk adverse investors, leading to quite an adequate preparations
Size: -Town: With the large number of natural resources available for exploitation it's hopped that the expedition will mange to secure a reasonably large bulkhead in the region for the exportation of rare and valuable goods back to the homeland.
Features Hazards and Boons: The world in question is Pyranus. A world of slightly larger then average size. It's 4 suns have insured that it's always daytime and lead rise to an abundance of plant life that's covered the surface of the whole world in a single massive rain. Gigantic continent sized trees form the most important aspect of the ecosystem, literally supporting all other living creatures and plantlife on and in their miles high trunks and branches. At the very top of the branches the leaves form a tough outer layer to protect against the blazing sun and frequent megastorms that sweep across the surface. This tough layer undulates across a majority of the planet, only broken by the occasional out jutting branch or the ocasonal break that leads down to one of the seas on the lower level.
Directly under that layer in the filtered sunlight lays the jungle proper. Massive branches that range from the size of other worlds trees to cities rise up from below. Growing on, in, and around these branches a dazzling array of life grows, crawls, flies, and hops. Great wooden bowls harder then steel jut upward to hold collected water creating massive seas that stretch further then the eye can see, filled with all sorta of strange and wonderful fish. Gigantic parasitic vines create massive highways between branches on which herds of ungulates move between leafy fields. Massive flowers burst open to release clouds of spores, collected by shining red bees to take back to their bulging hives. An uncountable number of species, both harmful and helpful, fair and foul, live in this world below the canopy. This is the area where the expedition would house itself and build it's city. The founders already imaging a dazzling town suspended miles in the air, hanging off the sides of trees and lashed together with study rope like vines with the consistency of steel. The town will have to deal with the more dangerous animals if they are to survive, but if they do the rewards will be rich indeed. Rare and valuable organics of all types can be found and harvested here, ether for local use or export.
Below the upper layer the light slowly dims, filtered out by mile after mile of endless foliage, and here in the dim eternal twilight is where the great branches come and start to merge downward until there is more continent tree then open area is the trunkmaze. A endless progression of cracks and crevasses that stretches across the whole of the world. Here the trunks of the branches have lived for uncounted millennium and their wood has slowly changed over time, still alive, it straddles the line between plant and mineral, rock hard it can mined with a pickaxe or other stone breaking tooling, and running though it great streaks of mineralwoods collected over thousands of years that can be processed like metal if the are found by an enterprising treeminer. In even rarer clusters the lifebloods of the trees themselves have collected and slowly compressed, creating shinning treegems of a dazzling array of color and clarity. This layer can be of great use, both for practical applications and the creation of great mineral wealth, but beware! For down in the dim light the animals grow larger and stranger. Serpents the size of buildings slither among the cracks, and stranger and more dangerous creatures still. The terrain itself is not as friendly ether, as the trees themselves sometimes shake and settle in quakes that rarely reach the upper boughs, and great gusts of poison wind sometimes blow up from the dark crevasse below.
As the trunkmaze goes ever further downward the cracks grow more and more frequent, but slowly gain in size. Eventually if one keeps traveling downward they reach the dark crevasses. Cracks open up between the trunks of the continent trees, dozens of miles wide in places. A stygian abyss where the light from the quadruple suns finally totally fails. Not much is now about this area, as the darkness is the least of a travels worries in this place. A foul miasma wafts upward, poisonous and acidic fumes leak from the depths. And truly gigantic and cyclopean creatures seem to inhabit this pit, monsters of grand power and terror who are rarely seen, and rarely survived when they are. Still, this place does not hold zero attractions, down here in the depths the magic of the world pulses stronger then anywhere else in the world, and strange and magical plants and substances grow furtively. Brave explorers can harvest these treasures, and if they survive to tell the tale they are greatly enriched by their finds. Still it takes an iron nerve to search on the edges of the depths, and only the most foolish try to go deeper into the abyss, where they inevitably never return from.
Some scholars conjecture beneath even the great abysses there must be root structures for the trees, and possibly even an earth. However, their existence, and what else could possibly be down there is as of yet simply conjuncture.
Edit: Also I just read the thing about us being to vote/support (although I'm not sure how much votes count for, presumably we chaff somewhat under the ironyhanded dictatorship). I vote for my own! :3 Or, failing that, the greenhell looks the most interesting.