Final answer:
Angkor Wat is the world heritage site that was declared a 1st world cultural site by UNESCO along with Krakow, and lies next to the equator. Angkor Wat is one of the largest temple complexes in the world and is located in Cambodia.
Step-by-step explanation:
The world heritage site that was declared a 1st world cultural site by UNESCO, along with Krakow, and lies next to the equator is Angkor Wat.
Angkor Wat is one of the largest temple complexes in the world and is located in Cambodia. It is a well-preserved showcase of Khmer architecture from the early empire years.