Final answer:
Indonesia is the country located in Southeast Asia, which is a region known for its diverse cultures and landscapes.
Step-by-step explanation:
The country located in Southeast Asia is Indonesia. Southeast Asia is a region that includes countries like Brunei, Burma, Thailand, Laos, Cambodia, Vietnam, Malaysia, Singapore, and Indonesia. These countries are located between the Indian Ocean and the Pacific Ocean, have a tropical climate, and are known for their diverse cultures, languages, and landscapes.