Of all the caves in Phetchaburi province, Khao Luang is the most important and best visited, because of the large number of Buddha images found inside the cave, including a meters high Buddha image cast by order of King Chulalongkorn (Rama V).
The impressive caves are set in Khao Luang hill which is almost 100 meters high, just North of Petchaburi town. They consist of a number of caverns filled with beautifully illuminated golden Buddha images, several chedis and a great number of stalactites hanging from the ceiling.
King Mongkut (Rama IV) who reigned the Kingdom from 1851 until 1868 used the cave to study Buddhism and to meditate. He had a large number of Buddha images placed in the Khao Luang cave.
Tip: it is better to visit Khao Luang in the early morning, so you get a chance to see the sunrays gently touching the buddha inside the cave.