In Indonesia, many tourist attractions charge more than 10x higher ticket price to foreign tourists, compared to locals. It is the same in India.

I find this quite exaggerated. Basically they milk the cow. Luckily it is often possible to get the local price by bribing the employee selling the tickets.

Spotted at Air Terjun Bantimurung (Bantimurung waterfall), a waterfall famous for attracting many butterflies, is a popular spots for locals (Sulawesi Island, Indonesia)