The hills around Malang are home to many dairy farms. Cows imported from Australia and Europe seem to be happier in the cool, semi-temperate climate and happier cows make more milk.
On the slopes of Mount Kawi is the largest dairy operation in South-east Asia, the Greenfields dairy, home to the 6,000 Holsteins producing 20 million litres of milk a year, enough to fill eight Olympic swimming pools.
Watching over the operations is a Singaporean, Mr Alvin Choo.
He laughs when he is asked what a city boy is doing there, looking after a farm.
The 51-year-old head of dairy operations has been there for more than two years.
Before going over, he had worked in supply chain management for Fiji water and other products.
"I took this job to learn. There's no industry like this in Singapore," says the father of three. His family lives in Singapore, while he stays in a hotel in Malang and visits home once a month.
As we walk around the dairy, he stops to admire the farm's vantage point, at over 1,000m above sea level.
"This is my view every day," he says proudly, looking at the clouds and the town below.