Singles Cruises Australia Where To Travel For (1) WEEK? (Any Recommendations)?

Where to travel for (1) WEEK? (Any recommendations)? - singles cruises australia

I want to make an international trip, so that New Orleans, Louisiana, in September or October. I traveled to Brazil, Colombia, Domin. Republic. It was not the Caribbean. My budget is $ 3,000. This includes flights, accommodation, meals and entertainment. I am looking for a cultural museum, beaches, nightlife, historical ... Type of trip.

I must travel alone (25 men). My options are:

1) Alaska Cruise
2) Sydney, Australia (Inn Road)
3) Barcelona, Spain (hostel card)

Any other place to try, ... let me know.