Travel

Sydney opera house tour, Hop-On-Hop Off bus.
Get on the bus around 11:00 as the ticket is good for 24 hours. You can tour the first day then get back on the bus and go to wherever you want the next day for free within that 24 hours. Take your own plug in ear buds. They have some but …
Highly recommend the Blue Mountains. There’s a direct train there from Sydney. Do the Hop bus there. You’ll get a great map of all the trails and the bus will drop you at the trail head and pick you up at the end. The trails are very well tended and the views are breathtaking. The blue haze is a sunrise/sunset thing.

Brisbane
Lefty’s Music Hall was a blast. Caught a great concert there. It’s in a nightlife area. I was there 2 years ago and there was a lot of construction downtown which hopefully has been completed.
Lone Pine Koala Sanctuary - lots of koalas and kangaroos. Did you know kangaroos never stop growing? I learned that there.
Sounds like an amazing trip. Have a blast!