Adult Land is a special area under the Adrenaland amusement park for adults only.
Mr. and Mrs. Turner end up here when a Missing Child Booth attendant asks them if their child is missing and they reply "We didn't lose our Son", to which they are told "That's the password!" and sent here through a hole in the ground. Mr. and Mrs. Turner end up on a sofa that moves along a rail, and they are given drinks and treated in luxury, free of the worry of their children who are off having fun in the amusement park above them.
This area is located underneath the amusement park and has mud baths, massage beds, facial and manicure treatment, and a strict no kids policy.
Adult Land is for adults only, and when a child is found to have intruded inside, such as what Chester and A.J. did by standing on each other's shoulders underneath a trench coat, they are cornered by security and forced to leave and never speak of the place, under threat of not being able to keep Gah, the Norwegian supermodel talking dolls. Chester and A.J. agree to the deal because they want to have the dolls.
- Adult Land is a reference to a similar place in an episode of The Simpsons called "Itchy and Scratchy Land" where adults can go after they drop off their kids in the park.