Lisbon, Portugal - March 13, 2016: The ruins of the Moorish Castle on the mountaintop in Pena Park, Sintra.
Lisbon, Portugal - March 11, 2016: Scruffy houses on Rua Machadinho street.
Lisbon, Portugal - March 11, 2016: Traditional houses, gardens and office buildings cluster on a hillside leading down to the Tagus river estuary in Lisbon.
