Optical illusion:
The Dom Luís 1st bridge, Porto, Portugal
Optical illusion:
Just a street in Porto
Optical illusion:
Exterior of the Casa da Música, Porto
Optical illusion:
Rem Koolhaas in Portugal: Casa da Música, Porto.
Optical illusion:
Under the bridge
Optical illusion:
The Douro river in foggy Porto
Optical illusion:
A classic view on Porto...
Optical illusion:
Rooftop view on Ribeira, Porto
Optical illusion:
Living the good life
Optical illusion:
A remarkable silhouette
Optical illusion:
The silent alley's of Porto
Optical illusion:
Rooftops in Vila Nova de Gaia, Portugal