The Karimunjawa archipelago, located inthe Java Sea, north of the capital city of ,has everything to offer divers and backpackers who enjoy trekking andsnorkeling along a pristine beach. The Karimunjawa National Park (not to beconfused with the Karimun Islands in Bintan, Riau) is one amongst sevenmarine national parks in Indonesia. Taking only a four to five-hour trip fromSemarang, you will be surrounded by natural beauty, so that you wish that youcould stay there forever.
The pristine beaches and seas are home tohealthy coral reefs that scatter in an 80 km wide area all the way to the coastof Jepara. Two protected biota species here are the black coral (Antiphates sp)and organ pipe coral (Tubipora musica). Others include the triton trumpet, thehornet helmet, and the pearly-chambered nautilus. Here are also hawksbillturtles, common green turtles, and on land are the red-breasted parakeet andother tropical bird species.
Flights to Semarang are available from Jakarta, Semarang and also from other cities. Karimunjawa itself has an airport in KemujanIsland, called the Dewadaru Airport. Small aircrafts land here although theflight schedule is still dominated by chartered flights from Semarang,Yogyakarta, or Bali.
Ferries serve the islands three times aweek, either from Jepara or also Semarang, and speed boats are plenty andavailable on special request.
Source : indonesia.travel