This 92-metre hillock on the northern approach to Phetchaburi provincial capital (some 36 kilometres north of Cha-am), supports the Phra Nakhon Khiri palace constructed in 1860 by King Rama IV (King Mongkut). Phetchaburi residents refer to it as Khao Wang, literally Palace Hill.
The style is mainly European with some Thai and Chinese influences. Sitting on three peaks the temple of Wat Phra Khew is to the east; the main stupa of Phra That Chom Phet in the middle and the residential Grand Palace to the west.
Both Kings Rama IV & V used the palace at their leisure and to entertain their visitors. After the death of King Rama V it was used less and less and sadly slipped into a state of decay. In 1935 it was registered as a national monument by the Fine Arts Department and was restored to be a National Museum and National Park. Open daily 9am-4pm it can be conveniently reached by funicular railway round-trip 40 Baht. Once at the top entrance to the Museum is 30 Baht for foreigners and 10 Baht for Thais. It is an excellent half-day excursion and takes a couple of hours to walk the path linking the three peaks. The views are spectacular.