Pluto is a dwarf planet. Classed as a planet since its discovery, the discovery of Eris (a similarly sized but more more massive object further out) suggested that many similar "planets" would be discovered and the "dwarf planet" status was invented.
Pluto wasn't imaged in detail until the New Horizons spacecraft visited in 2015 and it currently has no named features. It does however have a number of proposed naming conventions ready for use.