Wat Chom Chuen
The remains of the small temple date from the Sukhothai period, although it's also thought this site was occupied by soldiers from Lanna for some time. The ruins consist of a truncated chedi along with a mondop in good condition.
However, the main draw here is the archaeological museum next to the temple. Excavations at this site has found evidence, including burials and ceramics, of human occupation dating back to the third or fourth centuries. The museum replicates the look and finds of the digging.
Admission to the archaeological museum is included in the all-inclusive admission fee. Otherwise, admission is 100 Baht.