Sultan Palace Museum
Looking out across the harbour, the Sultan Palace Museum is one of several royal palaces. This (and its predecessors on the same site) served as the “town house” of the Bu-Saidi Sultans.

The Peace Memorial Museum
Considered the National Museum of the isles, the Peace Memorial Museum is home to many of Zanzibar's memorabilia including, most notably, Livingstone's medical chest, a piece of Zanzibar's (and East Africa's first) railroad, and an old, palm oil-powered bicycle lamp.

For history buffs it is a great place to read up on Zanzibar's history as it relates to everything from slavery, the royal families, coins, stamps, local crafts and trade.