katalnaya gorka (roller coaster) pavilion in oranienbaum (lomonosov) park, saint petersburg, russia

pavilion katalnaya catherine park blue garden rococo building house tourism tree mountain skate heritage column old culture travel toboggan rolling balcony art sliding facade historic coaster roller summer hill petersburg palace architecture residence oranienbaum museum area gorka russia lomonosov complex landscape royal history russian saint landmark view imperial baroque russia