Island coast of Longz'ul

Where is this?
The Island coast of Longz'ul (pronounced Long Z yul), Said to be the birthplace of Sorcery in the oldest times of those who stood upright, most of the ancient city is gone once having floated high above the land until its power faded, its people weakened and its strength lost. The land around has since blossomed into a beautiful forest and a crystal clear ocean of sweet water, and finally the last relic of the ancient age The Arcane Citadel, a tower still full of magic and power and now a small settlement of archaeologists.
Why would your players want to travel here?
The land has much for an adventuring party or even a nomadic people looking to set roots. The great forest is largely undocumented and has many strange creatures and plant life including whole new fruits not found anywhere else, the ruins still hold many relics to be recovered that the archaeologists will pay well for if you don't decide to keep them yourself, plus any number of old estates and basements would make excellent bases of operations for any adventuring party if they could be renovated. Finally The Arcane Citadel has yet to be explored past the courtyard, many traps of magic have awoken to the arrival of people, there is much within that a party may seek -power, riches, glory, items of incredible power, arcane words that could still the heart of even a god, and of course...the beautiful caretaker of the citadel itself.

What difficulties do they face getting here?
The place is an island surrounded by many jagged rocks of coral and wrecked vessels leaving only three viable points of entry, two coast ports one on the far side of the unexplored forest the other by the old ruins and the Citadel and of course by air travel. The forest is dense and full of unknown beasts, lost creatures of old and ruins from times long ago forgotten possibly even by the gods. The coastline though beautiful is half bog, travelers without knowledge of the area will quickly find themselves neck deep in sinking mud water and who knows what lurks below in that filth. Finally there is a small band of pirates that have made there base in another nearby island, seeing the island as easy treasure they pick off the vessels leaving Longz'ul but are careful to leave any of the archaeologist vessels alone, the more of them on the island the more treasure they can dig up for the pirates!
https://dungeonmasterblock.freeforums.net/thread/1642/dm-nastics-87-journey-destination