Tidore Island is, in geological terms, a single massive stratovolcano. Kie Matubu rises 1,730 meters from the seafloor to its conical summit at the island's southern end, while the northern side holds the Sabale caldera with two smaller volcanic cones nested inside it. Three smaller islands trail southward like volcanic stepping stones: Mare, Moti, and Makian, each the peak of its own submarine volcano. The island's capital, Soasio, sits on the eastern coast with its port of Goto. The sultan's palace, destroyed and rebuilt multiple times over the centuries, was most recently completed in 2010. Despite its small size, Tidore today administers not just its own island and three outlying islets but a substantial portion of the Halmahera mainland, including the provincial capital of North Maluku, Sofifi.

Cloves made Tidore powerful. The sultanate arose in the 15th century, fueled by the global demand for spices that grew only in a handful of Maluku islands. Islam spread to Tidore around the late 15th century, and the sultans built a domain that controlled much of southern Halmahera. When the Portuguese arrived seeking spices, Tidore's rival Ternate forged an alliance with them. Tidore turned instead to Spain, and by the sixteenth century Spanish forts dotted the island. The arrangement was built on mutual suspicion: the Tidorese tolerated Spanish garrisons because they needed help resisting the Dutch-backed Ternateans, while Spain valued Tidore as a base from which to check Dutch expansion in the region and as a source of the spices that made the Moluccas the most coveted real estate in Asia.

After the Spanish departed in 1663, most regional states quickly fell under the thumb of the Dutch East India Company. Tidore did not. Under Sultan Saifuddin, who reigned from 1657 to 1687, the court developed a remarkably effective strategy. Saifuddin used Dutch payments for spices not to enrich himself but to fund gifts that strengthened traditional ties with Tidore's peripheral territories. He earned such wide respect among local populations that he rarely needed to call on foreign military help, a stark contrast to Ternate, which frequently depended on Dutch soldiers. The result was a sultanate that maintained genuine independence well into the eighteenth century, long after its neighbors had become colonial dependencies.

The Dutch eventually found a way to break Tidore without conquest: they destroyed its economy. The spice eradication program, known as extirpatie, aimed to concentrate clove and nutmeg production in a few controlled locations. Tidore and Ternate alike allowed the program to proceed in their territories, not fully grasping that it would gut the very trade that sustained their power. As Tidore's wealth declined, so did its control over its far-flung periphery. In 1780, the weakened sultanate was forced to sign a treaty reducing it to a Dutch vassal. Prince Nuku, refusing to accept this humiliation, fled Tidore and declared himself Sultan of the Papuan Islands, launching a guerrilla war that drew in Papuans, Halmaherans, and eventually the British. Nuku retook Tidore in 1797 and helped the British conquer Ternate in 1801, but his successor was expelled by Dutch forces in 1806, and Tidore's independence was extinguished for good.

The sultanate was abolished during the Sukarno era but re-established in 1999 with the installation of the 36th sultan, a ceremonial role that nonetheless carries real cultural weight. Today Tidore is a small city of roughly 122,000 people, divided between the island itself and the Oba districts on the Halmahera mainland. The provincial capital of North Maluku, Sofifi, sits on the Halmahera coast within Tidore's administrative boundaries, a geographic irony: the seat of provincial government faces the island that once governed the region's most powerful independent state. The sultan's rebuilt palace in Soasio and the Spanish-era forts scattered across the island draw visitors interested in the Maluku's turbulent colonial past.