Early written sources relate little about the eastern portion of
Borikén, Puerto Rico's indigenous name. Regardless of the scant data, the prehistoric cove must have been a busy place according to
rock carvings, some of which still adorn its coast. It should have become a combined
Taíno and
Kalinago (or Caribs) stronghold just before the moment of contact with the
Atlantic sojourners who came from across the ocean on
caravels in
1493. Late in the
Pre-Columbian era, a group of Kalinagos had begun a gradual migration from the
Orinoco's basin, occupying the
Lesser Antilles while moving north and reaching the nearby islands of
Vieques and
Culebra. By 1508, when
Juan Ponce de León's team of
Iberian adventurers had claimed the
San Juan Bay on the northern coast and settled
Caparra, the Caribs must have already established hegemony over the Ensenada Honda. According to colonial reports, their attacks proceeded from the Vieques Strait area, where they coordinated military movements with rebellious Taíno
caciques in the east. , in Ceiba, Puerto Rico (Ensenada Honda) European invaders had entered Puerto Rico from the west in search of the island's meager mineral wealth and seeking the submission of densely populated Taíno kingdoms. The alliance between caciques on the east and the more battled-experience Kalinagos from Vieques and Culebra however, eventually slowed down the Spanish advance and made the eastern coast less appealing to the colonizers. Pirates and
buccaneers, however, discovered the inlet's strategic value and for centuries, the region became known for smuggling and piracy. Even the infamous Puerto Rican pirate,
Roberto Cofresí, is said to have used the inlet as an entry point to mainland Puerto Rico from Vieques and Culebra. In 1819, according to a letter from Captain José de Torres, corsairs, apparently South American insurgents (patriots), determined to subvert the Spanish colonial power, landed on the Ensenada Honda but were repelled by the Fajardo local militia. The corsairs' attack led the authorities to pay more attention to the vulnerable region. It took the independent-minded leaders of the "Seiba" barrio to branch off from the municipality of
Fajardo and establish the town of Ceiba at the side of the bay in 1836. In their official application, the leaders hoped that the inlet of Ensenada Honda would usher an era of prosperous agricultural exports. In 1869, the Spanish colonial government began to pay closer attention to the bay with the planning of a
lighthouse on Isla Cabras, which sits at the inlet's entrance. And between 1879 and 1889, it set the Ensenada Honda mangroves aside as a natural preserve (). By the end of the century, Ensenada Honda had become the center of much economic activity around the timber, fishing and sugarcane industries. But, in 1905, the newly arrived U.S. Department of Agriculture saw it differently. It reported that "On the coast south of Fajardo and near to the village of Ceiba is one of the finest harbors in Porte Rico, which is wholly undeveloped. It is called the Ensenada Honda, and is landlocked, deep, and safe." ==Naval Base==