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Old Town (Historic Center)
The compact historic core of Lopburi west of the railway line is where all the major ruins, temples, and monkey action are concentrated. Phra Prang Sam Yot, San Phra Kan, Wat Phra Sri Mahathat, Phra Narai Palace, and Ban Wichayen are all within a 1 km walking radius. The atmosphere is old-town Thailand — narrow streets, street food carts, morning markets, and the constant background soundtrack of macaques. Accommodation is limited to budget guesthouses and small hotels, but the tradeoff is unbeatable convenience: you can be at the monkey temple in 5 minutes. The daily night market starts here at 4 PM, and the Wednesday Walking Street brings a buzzy local atmosphere to the evenings.