Latitude 30 degrees south and longitude 151 degrees east is located in Australia. Specifically, it is near the New South Wales coast, close to the city of Newcastle.
Sydney, Australia.
sydneyI'm not sure any city is at this location but Sydney, Australia is near this location.
sydney
In Australia slightly Northeast of Sutherland
The outdoor patio seating area at the Opera Bar on the lower concourse level of the Opera House is located at 33.8587° south latitude 151.2133° east longitude. Other spots around the Opera House complex and around the city have different coordinates.
Shanghai is located at 32 degrees north (latitude) and 122 degrees east (longitude). Shanghai is a major city in China.
The bay located at 34 degrees south latitude and 151 degrees east longitude is Botany Bay in Australia. It is a large inlet that serves as a major port and has historical significance as the site of Captain Cook's first landing in Australia.
Sydney, Australia is 34 degrees south, 151 degrees east
There is no such city as the maximum degree of latitude is 90 and the maximum degree of longitude is 180.
The entrance to the Bennelong Restaurant, at the Opera House, is located at roughly 33.8574° south latitude 151.2147° east longitude. Other spots around town will have somewhat different addresses.
There's no city at that location, or anywhere near it. That point in the sea off the coast of Japan, about 640 miles east northeast of Tokyo. The nearest city appears to be Sendai, about 550 miles due west of the point.