Marble Mountain is about halfway between Hoi An and Da Nang. You can take an elevator for a fee or climb the 150 steps to the top. It’s not a difficult climb though the steps are uneven.
If you approach the area by motorcycle ladies on their scooters will try to heard you into their gift shops parking area. Though aggressive I never found an issue with them.
The neighborhood is well worth exploring with stone carvers at work making for some nice portraits.