Complex sentence: Classic examples of these human-built canyons are made when streets cut through dense blocks of structures, especially skyscrapers and some such examples include the Magnificent Mile in Chicago, the Canyon of Heroes in Manhattan and Hong Kong's Kowloon and Central districts.
Split into simpler sentences: Classic examples of these human-built canyons are made when streets cut through dense blocks of structures, especially skyscrapers. Some such examples include the Magnificent Mile in Chicago, the Canyon of Heroes in Manhattan and Hong Kong's Kowloon and Central districts.