Muak Lek Arboretum is a botanical garden in Saraburi that covers an area of 115 rai and features a small river, with cascading rapids and a small waterfall, and two suspension bridges that cross the river.

Besides human visitors, the tranquil environment of the arboretum also attracts numbers of birds, some of which that come here to nest, such as this Lineated Barbet (fig.) who made its nest in a tree hollow.