Phra Nakhon Khiri Historical Park, commonly known as “Khao Wang,” is a summer palace commissioned by King Mongkut (Rama IV) in 1859 (B.E. 2402). The palace stands atop a hill approximately 92 meters above sea level, overlooking the city of Phetchaburi. Chosen for its strategic location and pleasant climate, Phra Nakhon Khiri served as a royal retreat, an administrative center for the western region, and a site for scientific study. It is recognized as Thailand’s first royal palace built on a mountain.

The palace complex was ingeniously planned to harmonize with the natural terrain and is divided into three main sections across three hilltops. These include the royal residential area on the western peak, Phra That Chom Phet on the central peak, and Wat Phra Kaew Noi on the eastern peak. This spatial arrangement reflects the traditional concept of balance between secular authority and spiritual power, a key principle in Thai kingship.

Architecturally, Phra Nakhon Khiri is distinguished by its harmonious blend of Western Neoclassical, Chinese, and Thai artistic styles. Major buildings include Phetphum Phairoj Throne Hall, which served as the royal residence and administrative hall and now functions as a national museum, as well as Pramot Mahaisawan Throne Hall and Wechayan Wichien Prasat, used for royal ceremonies and receptions.

One of the most historically significant structures is Chatchawal Wiangchai Throne Hall, an observatory where King Rama IV conducted astronomical observations based on modern scientific principles. This building stands as a powerful testament to the King’s intellectual brilliance and forward-looking vision in introducing Western science and knowledge to Siam during its early modernization period.

Following the reign of King Rama IV, Phra Nakhon Khiri continued to be used by later monarchs before gradually declining in royal function. Eventually, the Fine Arts Department registered the site as a national monument and designated it as Phra Nakhon Khiri Historical Park, ensuring its preservation as a vital cultural and historical heritage site.

Today, Khao Wang is one of Phetchaburi’s most iconic attractions. Visitors can stroll beneath tunnels of ancient frangipani trees, enjoy refreshing mountain breezes, and admire 360-degree panoramic views of the city below. Another charming and well-known feature of the site is the resident troop of monkeys, which has long been part of daily life on the hill.

Phra Nakhon Khiri is not merely a provincial landmark but a lasting symbol of Siam’s transition toward modernity, reflecting the wisdom, vision, and artistic legacy of Thailand’s revered monarchs that continues to shine across generations.

Private Car:

• Drive along Phetkasem Road into Phetchaburi city; the palace is clearly visible on the hilltop. Parking is available at the base of the hill.

Cable Car:

• For those who prefer not to hike, a cable car (tram) service is available to transport visitors comfortably and quickly to the peak.

Public Transport:

• From Bangkok, take a van or bus to the Phetchaburi station, then hire a Tuk-Tuk or motorcycle taxi to the park entrance.

Best Visiting Season:

• Visit in the morning (08:30 – 10:30) or late afternoon (15:00 – 16:00) to avoid the intense sun and catch a beautiful sunset.

Equipment and Attire:

• Wear comfortable walking shoes as the paths are inclined and paved with stone. Dress politely as it is a government historical site and royal residence.

Watch Your Belongings:

• Be cautious with the local monkeys; do not carry plastic bags or food in your hands, and secure glasses or hats to prevent them from being snatched.

Major Festival:

• If visiting in February, don't miss the "Phra Nakhon Khiri-Mueang Phet" fair, which features spectacular nightly light displays and fireworks.

Planning:

• Allocate at least 2-3 hours to explore all three peaks and visit the National Museum inside the throne hall.

Admission Fee

• Local visitors: Adult 20 THB, Child 10 THB (Cable car fee excluded)

• Foreign visitors: Adult 150 THB, Child 50 THB (Usually includes museum entry; cable car may be extra)

Opening Hours

• General daily hours: 08:30 – 16:30

• National Museum is closed on Mondays and Tuesdays, but the park grounds remain open