Three causeways of accurately aligned large stones .
用大石块精确排列铺砌的三条堤道。
There are a total of three causeways .
西湖上一共有三条堤。
Coastal zone protection : integrated management of coastal zones , constructing and upgrading coastal defences and causeways , and mangrove planting .
沿岸带保护：沿岸带综合管理、建造和更新沿海防护设施和堤道及种植红树林。
Four views of the ancient maya city of caracol show-clockwise from top left-a satellite picture , a lidar image of the tree canopy , a lidar image of agricultural terraces and causeways , and an archaeological map .
