Quito is located at 2850 metres above sea level and this determines its average temperatures. Definitely visit Quito, or use it a base for daily trips; just keep in mind, it may be colder there than you would expected.
Ecuador lies on the equator, that’s the place where the Earth is the widest. There are 13 countries that lie on the equator: Brazil, Colombia, Democratic Republic of the Congo, Ecuador, Gabon, Indonesia, Kenya, Kiribati, Maldives, Republic of the Congo, Sao Tome & Principe, Somalia, and Uganda.
Galapagos Islands belongs to Ecuador. However, the islands are so unique, that should be treated somehow separately, and I also had already a single month only about the Galapagos Island.
Anyway, it’s an amazing place and please have a look at my posts before planing your trip to the Galapagos Islands; I was trying to include some information how to make your trip more eco-friendly and ethical.