There are many options, the Hoover Damn, the Gran Canyon, Rock Climbing, ATVs, Dune Buggies and more.
The cruise addresses both gay singles and couples, with rates starting from $3999/person. This is where 70% in men end up anyway, so don't lose hope. https://Webin.Co.kr/bbs/board.php?bo_table=free&wr_id=1099375