Land turtles, also known as tortoises, are a type of reptile that is characterized by their large, heavy shells. They are found in many parts of the world, including Africa, Asia, and the Americas. They are typically herbivores, feeding on grasses, leaves, and other vegetation. Tortoises are known for their long lifespans, with some species living up to 150 years. They are also popular pets due to their docile nature and ease of care.