Lake Victoria
The latitude and longitude of Lake Titicaca is 15.7500-degrees south, 69.4167-degrees west. Lake Titicaca is located in the Andes on the border of Peru and Bolivia.
There is no city in that location. It is in the middle of a lake in Angola in South Africa.
12 degrees south and 34 degrees east is in Malawi. It appears to be nothing but forest. It is also very near to the shoreline of some lake, as to what lake it is, or the significance of this location I can offer no further information
Lake Victoria
There are many lakes such as Lake Winnipeg, Aberdeen Lake, Dubawnt Lake, Nueltin Lake, Southern Indian Lake and Lake Winnipegosis all located just east of the 100 degrees west longitude line.
Lake Van is located at 40 degrees north and 50 degrees east. It is the largest lake in Turkey and one of the largest alkaline lakes in the world.
The lake located at 10 degrees north and 73 degrees west is Lake Maracaibo. It is the largest lake in South America and is located in Venezuela. It is known for its unique natural phenomenon where lightning strikes the lake almost nightly, known as the Catatumbo lightning.
Lake Neuchâtel, Switzerland.
Since you did not specify the direction of longitude, the country located at 20 degrees south latitude and 140 degrees east longitude is Australia, while the country located at 20 degrees south latitude and 140 degrees west longitude is France. The location is French Polynesia, which is a French territory.
Southmere Lake
The national capital that lies at 2 degrees south and 30 degrees east is Kampala, the capital of Uganda. Located near the shores of Lake Victoria, Kampala is known for its hills and vibrant culture. The city serves as the political, economic, and cultural center of Uganda.