Climb Mount Arjuna and Mount Welirang. This is a tough 3 day expedition for experienced trekkers only. These two mountains combine to form a volcanic massif. Dormant Arjuna is at 3,338 m and active Welirang at 3,156m and the two are joined by huge saddle ridge. There are several ways to approach the trek but the best start point is at Selecta, 4 km north of Batu. You will need a guide and these are best found in Selecta village. If you are staying in Batu your hotel may also be able to help with connecting you to a good guide. Plan for two nights on the mountains in temperatures which can approach freezing. There is no need to cart tents as there are simple hut shelters used by the local sulphur workers and all guides will know the locations. You will need a warm sleeping bag and appropriate clothing though.
The lower slopes are lush but this gives way to a high terrain which more recalls the Andes or Tibet than tropical Indonesia! The same is true of the basic shelters in which you will be sleeping. The route from Selecta tackles Arjuna first and the views from the top are stunning - the whole volcanic spine of East Java stretches before you. The following day, Welirang offers similar magnificence with the added thrill of a steaming, sulphurous active crater. Be very careful on Welirang and take no risks - this Mountain is classed as a very active A-type by geologists. This is a very rewarding trek with views as good, if not better, than from any of Java's volcanic peaks.
Walk. The area in and around Batu and Selecta is very scenic indeed and lends itself well to casual walking as well as more strenuous treks.
Eat apples. They are everywhere and you can hardly not.
