Any of the Thai beaches, now wait, I'm off to Cha Am in 3 weeks time....
And Tijuana, not sure if that is a tourist place/attraction though?
Let me add Dreamworld, Bangkok.
Fort Lennox on Richelieu river, Quebec province, near USA boarder, not that many people visit there...

The bay of Halong, Vietnam. We were first boated to a stupid cave where thousands of tourist had to walk in line, we took a two days/one night trip with a night at Cat Ba. We left harbor at 10 and saw a few of the 2000 islands by 16.00 at last. When I mentioned/complained about this to our female your guide replied: not 2000 but 1835 islands. The only positive about this trip was the night at Cat Ba, excellent hotel, nice walk along a beautiful rock pedestrian sea walk.