There are over 160 different ethnic groups and indigenous peoples in Russia. Ethnic Russians with their Slavic Orthodox traditions, Tatars and Bashkirs with their Turkic Muslim culture, Buddhist nomadic Buryats and Kalmyks, Shamanistic peoples of the Extreme North and Siberia, highlanders of the Northern Caucasus, Finno-Ugric peoples of the Russian North West and Volga Region all contribute to the cultural diversity of the country.Tourism in Russia has seen rapid growth since the late Soviet times, first domestic tourism and then international tourism, fueled by the rich cultural heritage and great natural variety of the country. Major tourist routes in Russia include a journey around the Golden Ring of ancient cities, cruises on the big rivers like the Volga, and long journeys on the famous Trans-Siberian Railway. The Motherland Calls in Volgograd is the tallest statue of a woman in the world The most visited destinations in Russia are Moscow and Saint Petersburg, the current and the former capitals of the country. Recognized as World Cities, they feature such world-renown museums as Tretyakov Gallery and Hermitage, famous theaters like Bolshoi and Mariinsky, ornate churches like Saint Basil's Cathedral, Cathedral of Christ the Saviour, Saint Isaac's Cathedral and Church of the Savior on Blood, impressive fortifications like Moscow Kremlin and Peter and Paul Fortress, beautiful squares and streets like Red Square, Palace Square, Tverskaya Street and Nevsky Prospect. Rich palaces and parks are found in the former imperial residences in suburbs of Moscow (Kolomenskoye, Tsaritsyno) and St Petersburg (Peterhof, Strelna, Oranienbaum, Gatchina, Pavlovsk and Tsarskoye Selo). Moscow displays the Soviet architecture at its best, along with modern skyscrapers, while St Petersburg, nicknamed Venice of the North, boasts of its classical architecture, many rivers, channels and bridges. Russian cuisine widely uses fish, poultry, mushrooms, berries, and honey. Crops of rye, wheat, barley, and millet provide the ingredients for various breads, pancakes and cereals, as well as for kvass, beer and vodka drinks. Black bread is rather popular in Russia, compared to the rest of the world. Flavourful soups and stews include shchi, borsch, ukha, solyanka and okroshka. Smetana (a heavy sour cream) is often added to soups and salads.