Which two states share Great Smoky Mountains National Park?

In which state is Crater Lake? In which state is Acadia National Park? In which state is Carlsbad Caverns National Park? In which state is Mammoth Cave National Park? In which state is Mount St. Helens? In which state is Pearl Harbor? In which state is Kitty Hawk, where the Wright brothers made their first flight? In which state is Plymouth Rock?