13 Cais Palafítico da Carrasqueira

"This masterpiece of popular architecture, built in the 50s and 60s, is unique in Europe and is built on irregular wooden stakes, apparently fragile, which serve as a pier for the fishing boats that dock there. A tourist attraction, the pier continues to fulfill the mission for which it was built: to allow fishermen access to boats, even during low tide." (http://www.cm-alcacerdosal.pt/pt/muni...)