While we were on our Lost KOS Hummer tour through Kualoa Ranch we drove past this being built. The tour Guide told us that they were building a set for Journey to the Center of the Earth 2 3D or JC3D as all of the signs to direct workers to the site. He told us that the big rumor was that this movie was going to be based in Atlantis.
The next day we were looking for the place where in Lost the final battle, where Desmond killed Kelvin Inman, where the survivors crossed to get dynamite from the Black Rock in the season 1 finale, and Jacob's cave and we came upon the JC3D crew, didn't see actors but the signs were there and tons of trailers, etc.
Looks like there's a small beach area amid the rocks