I could think of dozens of example. How about a working farm? If done properly, they are cash cows. Everyone needs food all the time. Food is a perfect asset in every economic cycle, but especially during an inflationary cycle. It is historically offers the number one ROI, ranking above the equity markets and all other asset classes.
Or a portfolio of unique pieces of real estate in various jurisdictions. The key is unique. In other words, there will no other one like this one. Buy real assets that appreciate in value and offer an income.