Yes, it is generally safe to travel to Kalimantan. Like any travel destination, it's important to take standard precautions.
In terms of wildlife, while Kalimantan is home to a variety of species, encounters with dangerous animals are rare and can be safely managed with the guidance of local tour operators and by following park rules.
The region does have some volcanic activity, but incidents affecting tourists are extremely rare, and the local authorities monitor volcanic conditions closely.
As for crime, Kalimantan has a relatively low crime rate. However, as with any travel destination, it's recommended to remain vigilant, especially in crowded areas, and secure your belongings. Always respect local customs and laws to ensure a safe and enjoyable visit.