Sum-tsek Temple is a part of the Alchi Monastery and is quite famous for its architecture. The term Sum-tsek literally means 'three storied building'. The building is constructed in the Tibetan style of architecture with natural stone and loam as building material. This small structure enshrines three huge idols of four-armed 'bodhisattvas' or enlightened-beings, standing at a height of 4 m each.
The idol of Maitreya, the Buddha of the future also known as the Laughing Buddha, 4.63 m in height, is positioned at the centre of the floor. On the left and right side of the idol, are positioned a white Avalokiteshvara, a 'bodhisattva who embodies the compassion of all the Buddhas, and an idol of Manjushri, a 'bodhisattva' associated with transcendent wisdom, respectively.