Portugal, Porto, Vila Nova de Gaia, View over the rooftops and the River Douro towards the Ribeira area of Porto.

Portugal, Porto, Vila Nova de Gaia, Decorated tourist boats moored at a jetty with Sandeman sign, and the Ribeira area of Porto in the background.

Portugal, Porto, Vila Nova de Gaia, Decorated tourist boat with passengers in transit and Rabelo cargo boats plus the Ribeira area of Porto in the background.

Portugal, Porto, Vila Nova de Gaia, Rabelo cargo boats on the River Douro with the Ribeira area of Porto in the background, Rabelo cargo boats were used for bringing wine from the vineyards in the Dou...

Portugal, Porto, Vila Nova de Gaia, Rabelo cargo boat on the River Douro with the Ribeira area of Porto in the background, Rabelo cargo boats were used for bringing wine from the vineyards in the Dour...

Portugal, Porto, Vila Nova de Gaia, Rabelo cargo boats on the River Douro with the Ribeira area of Porto in the background, Rabelo cargo boats were used for bringing wine from the vineyards in the Dou...

Portugal, Porto, Vila Nova de Gaia, Rabelo cargo boats on the River Douro with the Ribeira area of Porto in the background, Rabelo cargo boats were used for bringing wine from the vineyards in the Dou...

Portugal, Porto, Vila Nova de Gaia, Rabelo cargo boats on the River Douro with the Ribeira area of Porto in the background, Rabelo cargo boats were used for bringing wine from the vineyards in the Dou...

Portugal, Porto, Dom Luis I Bridge or Ponte de Dom Luis I, Double-deck metal arch bridge over the Rver Douro which was opened in 1886, Rabelo cargo boats on the River Douro in the foreground that were...

Portugal, Porto, Dom Luis I Bridge or Ponte de Dom Luis I, Double-deck metal arch bridge over the Rver Douro which was opened in 1886, Rabelo cargo boats on the River Douro in the foreground that were...

Portugal, Porto, Vila Nova de Gaia, The Sandeman sign and logo on the Sandeman Port Building which is a granite building dating from 1811.

Portugal, Porto, Vila Nova de Gaia, The Teleférico de Gaia aerial gondola in motion high above the Sandeman sign and logo on the Sandeman Port Building which is a granite building dating from 1811.

Greece, Crete, Knossos, The North Lustral Basin building, Knossos Palace.

Greece, Attica, Athens, Temple of Olympian Zeus.

Greece, Attica, Athens, Temple of Olympian Zeus.

Greece, Attica, Athens, Close up of carved stone pediment of the Parthenon at the Acropolis.

Greece, Attica, Athens, The Parthenon at the Acropolis

Greece, Attica, Athens, The Parthenon at the Acropolis.

Greece, Attica, Athens, The Erechtheion, at the Acropolis.

Greece, Attica, Athens, The Erechtheion, at the Acropolis.

Greece, Attica, Athens, Odeon of Herodes Atticus, located on southwest slope of the Acropolis.

Greece, Attica, Athens, Stone seating in Odeon of Herodes Atticus, located on southwest slope of the Acropolis.

Greece, Attica, Athens, Odeon of Herodes Atticus, located on southwest slope of the Acropolis.

Greece, Attica, Athens, Hadrian's Library.