Beung Phra Ram Park
Beung Phra Ram is a large lake-filled park ('Beung' actually refers to the lake, not the park) that fills the area between the sites around the royal palace and Wat Mahathat. There are the remains of a few small temples spread out around the park, as well as some modern structures. Several paths and bridges make the park a rather nice place for an early evening walk or ride, as well as a popular place for joggers.
In ancient times, this area may have been used as the elephant stables for the palace.
There's no admission fee to the park.