Highest cliffs in the solar system are on Uranus' moon
The highest cliffs in the solar system are on Uranus' moon Miranda, according to the Guinness World Records. Named Verona Rupes, measuring nearly 33,000 feet high, they are more than ten times the height of the walls of the Grand Canyon in Arizona. The cliffs were discovered by NASA's Voyager 2 which encountered Uranus and its moons in 1986.