Hiking Diamond Head has been on my to-do list in Hawaii since the first time I came here, nine years ago.
(It's a volcanic crater.)
The mostly paved path is about 3 miles round trip, with oh somewhere around a million stairs.
There were signs and warnings everywhere that said to wear comfortable hiking shoes. We're no sissies though. Flip flops forever!
We were rewarded with a fantastic view of Waikiki and pretty much the entire southern coast of the island (and some guys head) at the top.
It took us about an hour and a half round trip, and the kids didn't even complain once! Pretty good considering they can't even make the ten minute walk to the beach without passing out from exhaust.