Art Nouveau building staircase, UNESCO World Heritage Site, Riga, Latvia, Baltics, Europe

photography colour colour image color color image horizontal horizontal image indoors inside day nobody no one no one travel destination travel destinations travel tourist destination art nouveau style architectural detail unesco unesco world heritage site world heritage site riga latvia baltics europe european building exterior building buildings building interior building interiors interior interiors architecture architectural history historical historic heritage ornate low angle view low angle top section detail symmetry diminishing perspective vanishing point perspective geometric full frame staircase