One of the most imposing monuments is the Hili Grand Tomb, located in the Hili Archaeological Park. More than 4,000 years old, the structure is 12 metres in diameter and must have originally been at least 4 m tall with a roof. When the building was restored in the mid-1970s, it was left unroofed.
Next to the Grand Tomb is Hili Site 1, once a tower built from mud bricks that would have stood several metres high. When it was excavated in the 1960s by Danish archaeologists at the invitation of the late Sheikh Zayed bin Sultan Al Nahyan, Founding Father of the UAE, the tower was found to have a thick circular wall, within which were several rooms served by a central well. Only the foundations of this building remain today.
A similar structure, Hili 10, is also located in the park and also has a well at its centre. Its 3 m-wide circular wall suggests that it was once a stronghold, perhaps controlling trade routes across the region
The Hili area also features a falaj irrigation system, which used ground-level and underground water channels to bring water from the nearby mountains, and the remains of several villages, all from the Iron Age.
Excavation of one of the houses at Hili Site 17 showed this village may have been involved in pottery production. The house walls were built of mud bricks and still stand several metres high.
Another site, Hili 2, contains many houses with well-preserved walls, some standing 2 m tall. Large storage jars found inside indicate a prosperous community, possibly due to the presence of the nearby falaj irrigation system.