Reimar Horten's little 1950's lifting-body Delta wing: I.Ae. 37

(Lifting body, or more particularly blended wing.)

The two best wikimedia images are probably:

https://commons.wikimedia.org/wiki/File:Ia_37_II.jpg

https://commons.wikimedia.org/wiki/File:FMA-I.A.37-planeador...

https://commons.wikimedia.org/wiki/Category:FMA_I.Ae._37