Australia is a vast and diverse country with many amazing places to visit. Here is a suggested itinerary for a three-week trip to Australia:
Week 1: Start in Sydney and spend a few days exploring the city's iconic landmarks such as the Sydney Opera House and the Sydney Harbour Bridge. Take a day trip to the Blue Mountains and spend some time on the beautiful beaches in the surrounding area.
Week 2: Fly to the tropical city of Cairns and spend a few days exploring the Great Barrier Reef. Consider taking a boat tour or snorkeling trip to experience the reef up close. From Cairns, you could also visit the Daintree Rainforest and Cape Tribulation.
Week 3: Fly to Melbourne and spend some time exploring the city's vibrant arts scene and delicious food and coffee culture. Take a day trip to the Mornington Peninsula to visit the wineries and beautiful beaches.
This is just one example of an itinerary, and there are many other options and possibilities depending on your interests and preferences. Some other places to consider adding to your trip might include the Gold Coast, the Whitsunday Islands, and Uluru.