NGC 7000 / C20 - The North America Nebula
The North America Nebula is an emission nebula in the constellation Cygnus, close to Deneb. The shape of the nebula resembles that of the continent of North America, complete with a prominent Gulf of Mexico.
It is about 2,590 light years from Earth. It was first discovered by William Herschel in 1786.
Wikipedia: https://en.wikipedia.org/wiki/North_America_Nebula