The Fagan Memorial Cross was erected in memory of Paul Fagan the San Francisco financier who built the original Hotel Hana Maui.
It’s a 30-40 minute steep hike up through a cow pasture. If you are staying at the Hotel Hana, you can get a key to the gate that lets you drive up a narrow, bumpy path.
Just be warned whether you hike or drive, you will face many cows and cow "blossoms" 😉