Purussaurus by Jorge Antonio González
(Source: Gonzalezaurus.deviantart.com)

Titanoboa cerrejonensis by James Gurney | Oil 2009 35.56 x 45.72 cm (14” x 18”) Private collection.
“With a subject he could neither see nor photograph, Gurney constructed a small maquette scene from oven-hardened clay, rocks, and sticks in a Chinese food takeout container. Challenged by the the snake’s extraordinary length, he decided to show the titanoboa rising half out of the water in a death match with a crocodilian, a giant forebear of the modern crocodile. “The main purpose of my piece is to try to imagine what would otherwise just be a fairly ordinary fossil—to go from that to imagining a very dramatic moment in the life of this creature and to take us in a time machine to see what it really might have looked like,” says Gurney”. Full article.
(Source: artrenewal.org)

Titanoboa cerrejonensis (detail and full picture) by Jason Bourque. Even larger picture here
And yes, this is like yesterday’s post from rhamphotheca with less info but with better resolution and colour, I’m that shallow. Go there to read about Titanoboa.