Namibia is 31,407,582 times larger than National September 11 Memorial & Museum.
Area: 824,292 km2 World Factbook
Population: 2,198,406 (July 2014) World Factbook
Namibia, officially the Republic of Namibia, is a country in southern Africa whose western border is the Atlantic Ocean. It shares land borders with Angola and Zambia to the north, Botswana to the east and South Africa to the south and east. Wikipedia
Area: 0 km2 calculated
The National September 11 Memorial & Museum is the principal memorial and museum commemorating the September 11 attacks of 2001, which killed nearly 3,000 people, and the World Trade Center bombing of 1993, which killed six. Wikipedia