The main structure at Wat Chang Lom is a large bell-shaped stupa. There are big sculptures of elephants, totalling 39, all around the base, which is reflected in the name of this temple.
Contrary to other temples in the Sukhothai area, these elephants show their entire body, not just the head and front legs.
The second level of the base of the stupa has 20 niches , which contained seated Buddha images, a feature inspired by Mon temple architecture. A railing in the form of snakes surrounds this level of the stupa.
Higher up are just below the spire of the chedi are reliefs of walking Buddha Images. You should walk away from the temple quite a bit, and then possibly look through a zoom lense to see them properly. Similar reliefs are more easily visible at Wat Khao Sawankhiri (on a hill northwest of Wat Chang Lom).
In front of the stupa are the remains of an assembly hall (viharn). Another smaller assembly hall and the remains of a smaller stupa southeast of the main stupa.