Around the whole structure is a retaining wall with a narrow corridor allowing visitors to explore the carvings on every exterior wall.
The narrow corridor was built purely so that tourists could see all of the carvings on the exterior.
mnli hypothesis: The narrow corridor was built purely so that tourists could see all of the carvings on the exterior. premise: Around the whole structure is a retaining wall with a narrow corridor allowing visitors to explore the carvings on every exterior wall.