Lindau's harbor has served as the gateway to Lake Constance since the Bavarian railway reached the island in 1853, transforming a modest fishing port into the busiest ferry terminus on the Bodensee. The Bodensee-Schiffsbetriebe fleet operates year-round from Hafenplatz, where the marble Bavarian Lion and the New Lighthouse frame the departure quays. More than two million passengers board annually, bound for twenty-three harbors across three countries. Lake Constance boat trips from Lindau trace routes unchanged since the nineteenth century, when Habsburg and Bavarian steamers competed for the lucrative Bregenz and Konstanz lines. The three-country panorama cruise remains the most requested itinerary, circling the Obersee basin past Wasserburg's peninsula church, the Swiss Alps rising beyond Rorschach, and the baroque spires of Bregenz before the return crossing to Lindau. The route takes three hours and touches no land, a floating border crossing without passport control. Spring sailings pass orchards in blossom along the Bavarian shore; autumn schedules align with the Bregenz grape harvest. Mainau Island lies seven kilometers west, reachable by direct ferry in thirty minutes. The crossing follows the northern shore, where medieval Wasserburg and the onion domes of Birnau Abbey punctuate the ridgeline. Vessels built in the 1990s—MS Sonnenkönigin, MS Stadt Lindau—carry four hundred passengers on open upper decks, their diesel engines replaced by hybrid drives in 2022. The island's baroque palace and thirty-hectare gardens draw half a million visitors each season, most arriving by water. Ticket offices at Hafenplatz open daily at nine, though online reservations now account for sixty percent of sales. The BSB timetable distinguishes Kursschiff routes—fixed schedules with numbered stops—from Rundfahrt loops that return to Lindau within two hours. Evening sailings from May through September extend service until sunset, when the Allgäu Alps turn violet against the last light. Ferry connections link Lindau to Bregenz in forty minutes, Konstanz in two hours, and Meersburg—across the narrowest point of the Überlinger See—in ninety minutes. No bridges span the lake; every crossing relies on the white-and-blue fleet that has defined Bodensee transport for a century and a half.