|Boeing 747 SP HL7456, in flight over Washington, prior to delivery to Korean Air Lines in 1980/81|
You can't really see it in this picture, but the SPs wingspan is actually greater than its length. The tail is taller than a normal 747, too. Boeing expected to sell more than 200 SPs but the orders never materialised, and ultimately only 45 were ever made. Some are still flying - one services VIP guests coming to and from the casinos in Las Vegas, and one has been converted to an airborne observatory.
This particular SP was delivered to Korean Air Lines in 1981, and flew with that airline until 1998, when it was bought by the Boeing Holding Company. It sat at Marana Airport in Arizona for eight years, and attracting no buyers, it was eventually scrapped in 2006. Here's a picture of how it ended up.
This image originated from a badly faded, creased and generally crappy 8x10in colour print, found in a junk shop near Seattle. I've done a lot of colour corrections, got rid of the creases and increased the contrast. The result is not completely naturalistic, but I like it.