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A Stone's Throw

10 Jan, 2020

A child holds her father's hand tightly while boarding a pedal boat. Before her is the large lake that runs along Khao Ngu limestone hills. Located in Muang district in Ratchaburi, the site was once a rock mining area. It has since been turned into a public park, now known as Khao Ngu Stone Park.

"The weather is pleasant. The wind is also gentle. Being near water makes us feel relaxed. It is hard to believe that the place was once a mining site," said the father.

Listed among the popular attractions of Ratchaburi, tourists from near and far visit the park for its picturesque views -- pale grey limestone hills stand tall against the blue sky and green water, with a vivid green line of trees that grow along the foot of the hills.

Various types of fish live in the lake. A friend of mine bought two packs of fish food from a vendor, who told us to return the plastic bags to his shop so that he would reuse them -- an attempt to reduce plastic waste.

From his shop, we walked a bit further to a suspended bridge which connects to a concrete walkway built along the shore of the lake. It ends at a viewpoint, a raised platform that can act as a rest area for visitors.

The name Khao Ngu means hills of snakes. Locals believe that the area was home to serpents before the site was mined for quicklime. After the site became a public park, a large sculpture of a black snake inflating its hood was erected at the entrance.

According to the Department of Mineral Resources, the Khao Ngu hills were formed in the Permian period about 248-290 million years ago. During the Dvaravati period (6th-11th century), the area was developed as a site of Buddhist worship. Evidence for this can still be found in some of the caves, like Tham Cham, Tham Chin, Tham Pha Tho and Tham Ruesi, which house Buddha images carved on the cave walls, resembling the art of the Dvaravati era.

More than two decades ago, Khao Ngu was abandoned after the rock mining concession was discontinued. Recently, the provincial office of Ratchaburi refurbished the site as a tourist attraction, building the long walkway and introducing the pedal boat service.

The best time to visit the park is in the morning or late afternoon when the Sun is not too strong. The place can get crowded on weekends. In addition to the lake, visitors come to check out the caves. Motorists and cyclists can drive or ride their vehicles inside the park for this purpose. Extra caution must be taken while riding inside the park because troops of monkeys sometimes sit or lie in the middle of the road and refuse to move. Many of them look for food from visitors although there are signs asking tourists not to feed them.

From Khao Ngu Stone Park, we drove for about 30 minutes on Road 3291 to another hill site called Khao Cha-ngum in Photharam district. We stopped at Khao Cha-ngum Royal Study Centre for Land Degradation Development to learn about the royal project of His Majesty King Bhumibol Adulyadej the Great. The centre has helped farmers in the area turn hard soil that once could not be used for cultivation due to land misuse into fertile land.

Once there, we jumped on a "tourist tram", a modified truck with wooden rows for passenger seats, to get a bigger picture of the centre. The site covers an area of 870 rai. It is very green due to the farmland, ponds and forested areas. The present view is totally different from how it looked in 1986, according to an old picture on display there. Back then, the soil was red and dry, while no trees could be seen on Khao Cha-ngum hill.

"King Rama IX initiated the three major concepts for the project which are: do not abuse the forest, do not abuse nature and reforestation without planting," said Orapin, a grade six student who was a volunteer guide.

"In 1986, the king suggested to have reservoirs built. He also grew vetiver to help increase soil moisture as well as trees in the project," she said.

Today the project farms 48 species of vetiver found in Thailand and other countries like Sri Lanka. The project also has rice fields and various plots for growing vegetables and herbs. Orchards are full of tall fruit trees like mangoes, santols and date palms. About 10% of the land is used for raising animals such as ducks, chicken, goats and fish, said our guide.

The rice, vegetables and herbs are used in the kitchens and also packed for sale to visitors. The project, which is run by Chaipattana Foundation, also grows sunflowers and allows locals living in nearby villages to sell their farm produce inside the project.

Our trip to Ratchaburi would not be complete without a visit to a ceramic factory that produces ong mangkorn, a big water jar with a dragon design, a famous product of the province.

We visited Rueang Khong Ong (Pottery Legend) in the provincial capital. It has been open for three years and houses a museum which charts the history of ong mangkorn. There is also a workshop for visitors to have a go at making a jar of their own.

Ratchaburi is about a two-hour drive from Bangkok, so day trips are possible. It is a good destination to bring family members, especially kids who will enjoy getting close to nature this coming Children's Day.



  • Khao Ngu Stone Park is open daily. Admission is free.
  • Khao Cha-ngum Royal Study Centre is open daily from 8am to 5pm. Admission is free.
  • For more information, visit or call 032-240-803.
  • Rueang Khong Ong (Pottery Legend) is open daily and free of charge. It has a restaurant, cafe and shops selling One Tambon One Product (Otop) products of Ratchaburi. The museum is open daily from 9am-6pm with a ticket fare. Taking part in a workshop carries an additional charge. Visit facebook/PotteryLegend or call 098-2419148 and 094-683-4521 for more details.
  • Kad Withi Chumchon Khu Bua is open every Friday to Sunday from 9am to 8pm.
  • Tao Hong Tai Ceramics Factory is open daily from 8am to 5pm. Admission is free. Visit
  • For more information, visit the Tourism Authority of Thailand's website at or call TAT's Ratchaburi Office at 032-919-176.



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