THE Rottnest Island Authority is planning to demolish the prominent Dome cage building by the main Thomson Bay jetty and rehabilitate the prime beachfront site in addition to two new accommodation developments planned for the island. Announcing the accommodation plan, Tourism Minister Mark McGowan said a four-hectare site at Mt Herschel and a two-hectare site at South Thomson had been earmarked for sustainable tourism developments to cater for increased demand for accommodation on the island.