Rio de Janeiro is known for its natural beauty, beaches like Copacabana and Ipanema, carnival celebrations, and large urban forest. Portuguese is the main language, but Spanish and English are also used. The climate is warm and humid in the summer and mild in the winter. The document provides an itinerary for a 6-day trip to Rio de Janeiro that includes visits to popular destinations like Sugarloaf Mountain, Botanical Gardens, Tijuca Forest, and schedules flights from and back to Delhi, India.