Nagasaki - Map of Japan JS1101E/GEK1002 (sitios de interés)

Specifically, this point sits on the location of the Dutch settlement of Dejima, important during the Edo Period (Tokugawa Period). This was the only permanent settlement of a Europeans allowed in Japan for over 200 years. If you zoom into street view, you can "walk around" Dejima. 

 

Or, you can visit this site about the recent restoration of Dejima. There are good summaries of the history of the island.

Here is a video taken by a tourist to Dejima. It gives you a feel for the architecture of the time.