Tomar

Tomar exists because of the Knights Templar, and the Convento de Cristo that towers over the town is one of the most complete records of the order's rise, near-destruction, and reinvention anywhere in Europe. The Templars founded a fortress here in 1160 under Grand Master Gualdim Pais, and its core surviving structure, the Charola, is a round church modelled directly on Jerusalem's Dome of the Rock, reflecting the order's origins protecting pilgrims to the Holy Land. When the Templars were dissolved across Europe in the 14th century, Portugal's king sidestepped the order's destruction by founding a new chivalric order, the Knights of Christ, and installing them in the same buildings with the same possessions. That continuity mattered enormously to Portuguese history: the Knights of Christ funded and staffed the maritime expeditions of the Age of Discovery, with Prince Henry the Navigator serving as the order's governor, which is why the order's red cross appears on the sails of Portuguese caravels in nearly every painting of the period. The convent's single most photographed feature is the Manueline chapter house window on the west façade, an extraordinarily dense carving of ropes, coral, and nautical symbols added under King Manuel I in the early 1500s. Beyond the Charola and the window, the complex unfolds into eight cloisters spanning Romanesque to Renaissance styles, enough to justify the two hours or more a proper visit takes. The old town below is a pleasant, low-key place to have lunch, with a small historic synagogue-turned-museum near the centre. Tomar sits further from Lisbon than anything else on this list, but a direct train removes the complexity that would otherwise push it lower — it's simply a longer single hop, not a harder one.