DAR ES SALAAM, Sept. 15 -- TANZANIA, a country blessed with stunning landscapes, wildlife and cultural richness, has one more hidden treasure – its historical sites.

But heres the catch: While Tanzanians are busy visiting beaches, parks and savannas, foreigners are paying top dollar to study the same history that many locals dont even know exists.

Its like discovering your own grandmothers ancient recipes only to find out the world has already booked a flight to your kitchen for a taste! Take, for instance, the island of Zanzibar.

The Spice Tour? Tourists flock there, snapping photos and buying spices to take home.

Yet, how many Tanzanians have taken the time to explore the rich history of this island — from its pivotal ro...