Watch On the Edge of Lisbon (2013) : Full Movie Online Free During the low tides, the Tagus estuary is an extraordinary place. The boats are resting on the sand. The vase of the river is revealed, black and thick. Vasco da Gama's bridge seems to move towards the continent. On the horizon, we guess some silhouettes. Sometimes those are flamingos. At other times, those are clams gleaners coming to work by hundreds.