21 World Heritage Sites you have probably never heard of

Unesco has now named more than 1,000 World Heritage Sites (1,031 in total). Here we delve into the more obscure treasures on the organisation's list.

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Island of Gorée, Senegal

Year heritage status achieved: 1978

Background: Off the coast of Senegal opposite Dakar, the island of Gorée is a memorial to the African diaspora. From the 15th to the 19th century, it was the largest slave-trading centre on the African coast. It serves now as a reminder of human exploitation and as a sanctuary for reconciliation.

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By Jolyon Attwooll

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Mapped: All the world's 1,031 World Heritage Sites