Lowell Observatory

The self-styled "Home of Pluto" is a well-deserved name. This is where the dwarf planet/not-a-planet was discovered on February 18, 1930. Since then the debate is ongoing about Pluto and how to classify it. But this observatory will always be known where the controversial rocky sphere in the Kuiper Belt was first spotted. The observatory is open seven days a week, 10 AM to 10 PM Monday through Saturday and 10 AM to 5 PM on Sunday. Admission for adults is $22 per person, but is discounted to $16 per person on Sundays.