It’s unavoidable to skip spice tour. Spices were first introduced by the Portuguese back in the 16th century, when they were transported over from colonies in Goa and Brazil. It wasn’t until the Omanis arrived, though, several hundred years later, that the spice trade truly thrived. The Sultan transported 50,000 slaves through Zanzibar each year, forcing a third of them to work on the spice farms in Tanzania — 30% of whom died every year due to the terrible conditions. These spice and slave trades combined to make Stone Town one of the richest cities in Africa. Everybody who visits Zanzibar finish up taking a spice tour. It’s unavoidable. Spices were first introduced by the Portuguese back in the 16th century, when they were transported over from colonies in Goa and Brazil. It wasn’t until the Omanis arrived, though, several hundred years later, that the spice trade truly thrived. The Sultan transported 50,000 slaves through Zanzibar each year, forcing a third of them to work on the spice farms in Tanzania — 30% of whom died every year due to the terrible conditions. These spice and slave trades combined to make Stone Town one of the richest cities in Africa.