At Cannon Beach, the obvious attraction is the cannons.
They sit near the water as if the beach had briefly forgotten what century it was. Around them, visitors swim, children explore the shallows, and the sea appears calm enough to deserve our trust. The iron interrupts that impression. It points back to a time when these waters were among the most important—and most dangerous—maritime passages in the Western Hemisphere.
For centuries, Spanish ships moved through the Straits of Florida carrying silver, gold, tobacco, military supplies, and the accumulated ambitions of an empire. The Gulf Stream offered a swift route northward, but the same current pushed ships toward reefs, shoals, and sudden weather. The Florida Keys lay beside this route like a broken stone wall beneath the sea. A captain could sail within sight of the islands and still lose a vessel on coral hidden just below the surface.
The cannons at Pennekamp do not belong to one complete shipwreck preserved in place. They are part of an interpretive reconstruction meant to represent the Spanish vessels that once passed through—and sometimes failed to pass through—these waters. About 100 feet offshore, additional cannons and artifacts form a shallow snorkeling site that evokes the wrecks scattered along the Keys.
Those wrecks helped shape the islands’ earliest economy under American rule. Salvage crews watched the reef line for ships in distress, then raced out to rescue passengers, unload cargo, and claim a share of whatever could be saved. Wrecking was both a public service and a business opportunity, and the distinction between the two occasionally depended upon who reached the ship first.
Key West grew wealthy from this trade. Admiralty courts divided the value of recovered cargo, while warehouses filled with goods pulled from damaged vessels. The reef that destroyed ships also created livelihoods. Disaster arrived offshore, and the Keys learned how to turn it into commerce.
Standing beside the cannons, it was difficult to reconcile that history with the peaceful water before us. Yet that contrast is central to the story of the Keys. The sea has always been both road and barrier, provider and destroyer. It carried people, wealth, and ideas through the islands, but it never promised safe passage.
The cannons remain because the beach is not only a place to swim. It is a reminder that the bright water surrounding the Keys has always concealed a harder history just beneath the surface.