Singer House on the corner of Nevsky Prospekt and the Griboedov Canal is one of the most striking buildings on the boulevard — an Art Nouveau commercial palace clad in granite, bronze, and glass, topped with a remarkable glazed tower and a globe held up by valkyries. Since 1919 it has housed Dom Knigi (House of the Book), the city's largest bookshop and a cultural institution in its own right.
Spend time on the upper floors, where the architecture is at its best, and visit the cafe on the second floor for one of the better Nevsky-and-canal views in town. The street level has shifted to mass-market bestsellers; the upper floors still cover Russian literature, art, and academic titles in depth.