Bali is always their top pick. In North Sumatra lies Lake Toba, a hidden gem that intertwines historical and cultural allure.

This natural body of water — the largest volcanic lake anywhere — fills the caldera of the Toba supervolcano, which erupted some 69,000 to 77,000 years ago. Some of the best attractions in the ...

Photo: Ekho Budi Utomo/Shutterstock Imagine trekking through savannah fields and sandy terrain to the peak of the second-highest volcano in Indonesia, Mount Rinjani in Lombok. Or picture waking up to ...