Our investment experiences have been the same. Land investment has been very lucrative for us.
One great thing about buying land is that unlike stocks, a piece of land doesn't have an army of analyst following it and tracking it, so once we figured out what to look for in land investment (e.g. highway/major road frontage, no power line easement, no floodplain, water available, good soil/hay production, etc.), it has been very easy to identify good, undervalued properties to buy (and bad properties to avoid). Also, having a solid network of locals really helps in identifying good properties for sale before they get formally listed.
Sale of land by heirs in particularly can be of good value, because heirs usually just want to get rid of a property they inherit instead of trying to maximize returns. We bought one such parcel 20 months ago at below market value from an heir, subdivided it, put it water meters and sold the lots (except for a large street corner lot which we are keeping for future commercial development) for 4x what we paid for.
We started buying about 14 years ago and since then, the average land price/acre in the area has gone up 6x, helped by encroaching suburban development and the creation of a new 10-square mile water reservoir/lake with recreational opportunities. Got a few thousand acres (all paid in cash) yielding a very nice income from renting to farmers and ranchers right now and still buying more every year.