Fervedouro das Macaúbas is a natural spring located in Mateiros, within the Jalapão region of Tocantins, Brazil. Visitors can enter the pool to float due to the strong upward water pressure, while access is typically guided and time-controlled. The site is considered one of the largest fervedouros in the area, noted for its distinctive green water, with a limited capacity of around ten people at a time, as well as regulated visiting hours and fees that help manage use and protect its natural conditions.