"Lindorm" is a European term that is generally used for dragons that had legs but lacked wings. Thus, they were landbound by definition, though this certainly did not keep them away from that favorite haunt of dragons, the water. Thus, some lindorms could be classified as water monsters too, if you want to get picky.
Sweden is the place with the largest numbers of modern sightings of lindorms. These beasts were usually long and serpentine, about a foot in diameter, with huge eyes. The usual color scheme was black with a yellowish underside. Highly aggressive, Swedish lindorms terrified witnesses with their hissing, spring attacks and blood that exuded poisonous, smelly fumes. According to some theories, lindorms were actually sea serpents who were traveling overland, possibly to spawn in secluded lakes. This idea resembles characteristics found in some Loch Ness monster sightings, in which the monster could clamber ashore just like a seal can.