If you are interested in the cheeky monkeys, who scamper around stealing food from tourists and causing general mischief, particularly good spots to see them are around the Khmer temple, Prang Sam Yot, and Sarn Phra Karn. All these temples are also interesting in their own right, as are Wat Phra Si Ratana Mahathat and the former royal palace of Phra Narai Ratchaiwet, which also houses the Lopburi Museum, a great place to cool down and learn more about the local history.
The people of Lopburi take good care of the city's monkeys as they believe them to be descendants of the monkey lord Hanuman. According to the holy book the Ramayana, Hanuman was a great hero who rescued Sita from her imprisonment in Sri Lanka and built Lopburi as his kingdom.
To the north of Lopburi, the famous and beautiful Saplangka Wildlife Sanctuary provides the perfect day trip for nature lovers. Also worth visiting is the nearby European Palace of Chao Phraya Wichayan, which has many interesting design and style features and some beautiful gardens in which to relax for a while.
Steeped in interesting history, Lopburi is full of temple ruins, which mainly date from the Ayutthaya period. Particularly of note are Wat Nakhon Kosa, Wat San Paolo, Wat Sao Thong and Wat Indra.
A great time to visit Lopburi is during the Monkey festival at the end of November, when the furry inhabitants are treated to a huge feast at the expense of their human neighbours, who take good care of them throughout the year.
Also look out for the King Narai Festival, which occurs in the middle of February and lasts for three days. The festival is marked which displays of local food and textiles, singing and the much anticipated traditional lakhon ling drama which, believe it or not, is performed by monkeys!