Santichaiprakarn Park and Phra Sumen Fort in Bangkok, Thailand

Santichaiprakarn Park is a small urban park of about 8 rai in Bangkok located on the ending phase of Phra Athit Road, Chana Songkram Subdistrict, Phra Nakhon District east bank of Chao Phraya River at mouth of Khlong Bang Lamphu in the area of Bang Lamphu. Opposite Rama VIII Park in Thonburi side.
The fortifications of Bangkok consist of several series of defensive structures built to protect the city during the late Ayutthaya to early Rattanakosin periods. The earliest structures were built when Bangkok was an outpost of Ayutthaya guarding entry to the Chao Phraya River during the 15th–16th centuries.