In addition to the districts, there are Territorial Units with Special Status. These usually include areas with small or no permanent populations. Such is the case with the All-Russia Exhibition Centre, the Botanical Garden, large parks, and industrial zones. In recent years, some territories have been merged with different districts. There are no ethnic-specific regions in Moscow, as in the Chinatowns that exist in some North American and East Asian cities. And although districts are not designated by income, as with most cities, those areas that are closer to the city center, metro stations or green zones are considered more prestigious.