Lygumai Hill is located in the south-eastern part of the park, on the southern shore of Lake Vajuonis. This 180 m tall hill has steep slopes and is surrounded by three lakes. Therefore, it looks like a giant observation ground, with Lake Vajuonis lying in the north and a panorama of Lake Kretuonykštis. In 2013 a new 15 m tall view tower was built here. Lake Kretuonas can be easily observed from this tower. The old tree alley at the foot of the hill indicates the site of a former manor-house.