Australia has an international airshow every two years at Avalon near Melbourne. It is especially good to attend on a Friday when it runs into the night. Be prepared for noise you can feel, sights to challenge belief, and technology, old and new that is pushed to the limits.
Everyone should endeavour to attend a major airshow at least once in their life. Ear protection a must for the younger folks as the noise can be intense. Just experience the raw excitement.