Almeida

From above, Almeida is perfect geometry — six pointed bastions and their ravelins radiating from the walled town like a weapon aimed at Spain, twelve points in all. At ground level the scale turns visceral: a two-and-a-half-kilometre perimeter, a dry moat deep enough to swallow a building, and underground passages reaching into darkness beneath the glacis. The wind on the ramparts carries nothing but space.

Almeida ranks among the finest star fortifications in Iberia, its bastioned trace built to shrug off seventeenth-century artillery from any angle. The Peninsular War decided its story: in 1810 a French shell found the main powder magazine, the explosion killed hundreds and forced the garrison's surrender, and the rebuilding pattern is still readable in the street grid — with the casamatas, the bomb-proof troop shelters, and the military museum now occupying the defensive geometry. Underground passages thread from bastions to ravelins beneath the glacis. The town stands on the high Beira plains as the anchor of a frontier-fortress chain running south through Castelo Rodrigo and Castelo Mendo, and the full rampart walk reads the whole star in under an hour.