The harbour at Cala Ratjada was built to move fish and timber, not tourists. Its quays served a working port for most of the twentieth century, when the sea meant labour rather than leisure. That inheritance still shapes the waterfront. Carrer del Moll, the address from which the modern fleet departs, remains a functional pier rather than a promenade dressed for visitors. Cala Ratjada sits at the far northeastern tip of Mallorca, in the municipality of Capdepera, where the Serra de Llevant range descends abruptly into the Mediterranean. The geology is Jurassic limestone, porous and pale, cut by wave action into headlands, sea caves and narrow inlets known locally as calas. Faro de Capdepera, the lighthouse commissioned in 1861, still marks the island's easternmost point roughly 4 kilometres from the harbour mouth. On clear mornings the outline of Menorca is visible from the water, some 40 kilometres across the channel. This proximity made the coast strategically fraught for centuries; the fourteenth-century Castell de Capdepera above the town was raised against corsair raids that arrived, inevitably, by sea. What draws attention now is water clarity. The seagrass meadows offshore — Posidonia oceanica, a protected endemic species of the Mediterranean basin — filter sediment and stabilise the seabed, producing visibility that regularly exceeds 15 metres in settled summer conditions. It is this transparency, more than any single monument, that explains why cala ratjada boat excursions have become the defining way to read this stretch of coastline. Beaches such as Cala Agulla, Cala Mesquida and Cala Gat sit within a short sail, several backed by dune systems and pine woodland that road access barely touches. The sailing fleet reflects two distinct traditions. Coastal cruise vessels descend from the leisure boats introduced in the 1960s, when charter tourism reached the eastern municipalities and operators began running lunch sailings between the calas. Glass-bottom craft came later, borrowing a viewing-panel design refined in the Caribbean and adapted for the shallow rock shelves that fringe Mallorca's eastern shore. The hulls carry a recessed transparent floor, allowing passengers to observe seagrass, sandbanks and shoals of salema and sea bream without entering the water. The wind pattern governs everything. The embat, a thermal sea breeze, builds through the afternoon along this coast and roughens the surface after midday, which is why the calmest passages belong to the morning. Departure points vary: some glass-bottom sailings run from Cala Ratjada itself, others from Porto Cristo further south, near the Coves del Drac. Afternoon coastal cruises with refreshments serve a different mood entirely, catching the low light on the cliffs. The harbour charges nothing to enter — 0 EUR — and there is no gate, no ticket booth, no barrier. Each cala ratjada boat excursions tour is sold individually, as a ticketed sailing rather than as admission to a site. The pier itself remains, as it has always been, simply open.