Linked from
The 8 pages that link to Tagus, each with the reason it gives.
LisbonNarrower topic: Its broad estuary gives Lisbon a sheltered harbor and access to the Atlantic.
ToledoRelated: Its deep bend around Toledo forms a natural defensive barrier.
1755 Lisbon earthquakeRelated: The estuary placed Lisbon close to waters affected by the tsunami.
Cabo da RocaRelated: Its estuary lies east of the cape along Portugal’s coast.
Vasco da Gama BridgeRelated: The bridge crosses the Tagus at its broad estuary near Lisbon.