The Minahasa district is an area of highlands in northern Sulawesi, located south of Manado.
Lake Linow is a small volcanic lake south of Tomohon. On its shore there is a nice cafe with a terrace and views of a nearby volcano. The colour of the water of the lake can change over time due to hydrothermal vents which change the chemical composition of the lake water.
Bukit Kasih is a religious site in northern Sulawesi. It's in the middle of nowhere, 25km south of Tomohon. Here there are some shrines, temples, Christian chapels on a slope from which sulphurous gases are emitted.
Lake Tondano is the largest lake in northern Sulawesi. It lies at 680m of altitude and has a surface area of 48km². The lake is not very deep (the depth is in the 10-30m range). Around the lake there are a number of cafes and restaurants.
How to get to Minahasa district
The easiest way is to explore the area by car or for instance by taking a tour from Manado.
A good base from which to visit the area would be the city of Tomohon (or alternatively Manado).