Chinese graves in the gardens
Most of the buildings of the Sarawak Museum sit in a large landscaped garden and arboretum that is an attraction in itself. There are formal grand walkways, the most prominent of which leads up to a pillar called the Heroes Monument. However, if you look off to the side of the stairway you'll see several graves. Some are (or appear to be) Christian, some are Muslim, but the largest and most obvious are the Chinese graves. There's a small food center near the big intersection at the edge of the garden if you're hungry.