What was the worlds first heritage site?

The first world heritage sites were named in 1978. They were:

Aachen Cathedral (Germany)

City of Quito (Ecuador, Ecuador)

Galápagos Islands (Ecuador)

Historic Centre of Kraków (Poland)

Island of Gorée (Senegal)

L'Anse aux Meadows National Historic Site (Canada)

Mesa Verde National Park (United States of America)

Nahanni National Park (Canada)

Rock-Hewn Churches, Lalibela (Ethiopia)

Simien National Park (Ethiopia)

Wieliczka and Bochnia Royal Salt Mines (Poland)

Yellowstone National Park (United States of America)