Wat Yai Chaimongkon

Wat Yai Chaimongkon (on the Bang Pa-in Rd, 1km east of Wat Phanancherng) is a large working wat, with ruins that appear on some of the well known photos of temples in Thailand. It features a large reclining Buddha in saffron robes in its own ruined wiharn, and, most spectacularly, a huge chedi swathed in golden cloth set in a courtyard which is lined by Buddha images all wearing saffron robes. Very photogenic.

Wat Yai Chaimongkhon or Wat Chao Phraya Thai (วัดใหญ่ชัยมงคล หรือ วัดเจ้าพระยาไท) This monastery constructed in the reign of King U-Thong is located outside the city to the southeast in the same direction as the railway station; one can see its large pagoda from far away. King Naresuan the Great commanded that the pagoda be built to celebrate the victory of his single-handed combat on the elephant back. He also intended a huge construction to match the large pagoda of Wat Phukhao Thong, and named it “Phra Chedi Chaiyamongkhon”.

It is open everyday from 8.00 a.m.-6.00 p.m.
Admission fee is 20 baht. (Same sight as previous listing)

Thank you information from wikitravel.org