Cacti are typically found in dry, arid habitats such as deserts. They are well adapted to survive in environments with extreme heat and minimal water. The unique structural adaptations of cacti, such as their thick, fleshy stems that store water and spines that reduce water loss, enable them to thrive where other plants struggle. Popular regions for cacti include the Sonoran Desert in North America and the Atacama Desert in South America. Cacti play a crucial role in their ecosystems, providing habitat and food for various species while also adapting to survive under challenging conditions.