Complex sentence: It is one of three such cones (the others being Rocky Butte and Mount Tabor) inside the city that are home to a city park, Powell Butte playing host to the Powell Butte Nature Park.
Split into simpler sentences: It is one of three such cones (the others are Rocky Butte and Mount Tabor) inside the city. Each is home to a city park, Powell Butte playing host to the Powell Butte Nature Park.