[6] Phetchaburi is at the north end of the Malay Peninsula, with the Gulf of Thailand to the east and the Tanaosi mountain range forming the boundary to Myanmar.

[7]: 28  It protects mostly rain forests in the mountains along the boundary to Myanmar, but also the Kaeng Krachan Reservoir is part of the park.

In 1860, King Rama IV built a palace near the city of Phetchaburi, commonly known as Khao Wang, but its official name is Phra Nakhon Khiri.

[10] In 1910, King Rama V, constructed Phra Ram Ratchaniwet, now also known as Ban Puen Palace, slightly further south of Khao Wang.

In front are rice fields bordered by two coconut palm trees, symbolizing the major crops in the province.

[14] Phetchaburi's shoreline on the Inner Gulf of Thailand in the area of Pak Thale consists of salt pans, mudflats, mangroves, and sand spits.

Several regular visitors are under threat, including the critically endangered Spoon-billed sandpiper and Great knot, Nordmann's greenshank, and Far Eastern curlew.

The province, however, has dropped from the fourth to the sixth most popular destination in Thailand due to coastal erosion, much of it in Cha-am District, caused by rising sea levels leading to "deteriorating scenery".

As of 26 November 2019 there are:[21] one Phetchaburi Provincial Administration Organisation (ongkan borihan suan changwat) and 15 municipal (thesaban) areas in the province.

The non-municipal areas are administered by 69 Subdistrict Administrative Organisations – SAO (ongkan borihan suan tambon).

It consists of royal halls, temples and groups of buildings, constructed mostly in harmonious Thai, Western neoclassic and Chinese architectural styles.

This beach is under the maintain of the Royal Thai Army (RTA), similar to Hat Suan Son Pradiphat of neighboring province Prachuap Khiri Khan.

Located in the area of Ban Nong Kho Kai, Khao Puk Sub-district, Tha Yang District.

[29] Laem Phak Bia and Pak Thale (แหลมผักเบี้ยและปากทะเล) Large area of salt pans, mudflats, mangrove remnants and sand spit in Phetchaburi.

This is without doubt the premier birdwatching site for shorebirds in Thailand, with large numbers of birds and many rare species appearing annually.

Going on a cruise for watching these whales with mouths fully open above the water surface to stalk prey (anchovies and krill) is an impressive experience.