Muralha de Obidos (Obidos Town Walls), Obidos

Obidos is ensconced along a limestone ridge, encircled by the ancient and formidable Obidos Town Walls. These historic walls span 1.5 kilometers, reaching heights of up to 13 meters in certain sections. Originating from the Moors era, around the 8th to 11th centuries, these fortifications were subsequently reinforced by early Portuguese rulers. The existing walls, accessible to tourists today, were reconstructed following the severe devastation caused by the 1755 earthquake.

Visitors can amble along the walls, embarking on a scenic journey from the castle. Walking atop the walls offers stunning views of the valley and town below, although the narrow pathways might be unsettling due to safety concerns, yet the view from the town showcases the walls' impressive size and grandeur. The western section offers mesmerizing vistas over the town and its surrounding landscape. Historically, until the 16th century, the sea extended to the hill's base to the west of Obidos, constituting a significant port.

A word of caution: Walking the town walls demands care and attention, as they bear signs of age with worn surfaces and cavities, lacking hand railings for added safety.