It sometimes appears as Amoy on older maps.
We visited the temple one weekend, and were taken aback by the number of visitors, most of who seemed to be there to worship rather than just sight see like us. It is set on the side of a hill looking towards the sea (good Feng Shui).
A five minute ferry ride takes you to Gulang Yu, which, in the 1800s, was a foreign enclave. It has no cars or bikes, and the colonial architecture and beaches makes it a great day trip.