From London head south to Africa, the destination for today's Geo Quiz. We're headed for sub-Saharan Africa -- and the country of Angola.

Angola is bigger than Texas -- almost twice as big, in fact. And instead of armadillos, think African jackals and wildebeests. The country was a Portuguese colony for centuries.

Angola

It was Portuguese explorer who -- in 1575 -- founded the city that would become Angola's capital. The city is on the Atlantic Ocean. In colonial times, it was at the center of the slave trade with that other Portuguese colony, Brazil.

Today -- the city has nearly 5 million residents -- making it Angola's largest city. OK -- you take it from here. Name Angola's capital.

The answer's coming up...