I would go back to Arizona and southern Utah. The scenery there is wonderful, with steel-blue skies and guaranteed sunshine. The high desert is full of colour and interest. The breakfasts in the road-side Diners are epic, although it can be difficult to get a decent cup of tea or pint of beer !
Re Naomi's post, I have not seen all I want to see on earth by any means, but I would love to see Earth from low earth orbit, That would be amazing.
And would definitely involve ignoring cost, danger and altitude!
Cuba.. Friend went on holiday there last year and says it's like stepping back in time. Cars are all 1930's style, lively music and happy people. Would love to see for myself.