Billboard leases trailer and RV parksOther types my clients  have done in the past you wouldn't normally think of - marinas, deeded boat slips and racks, mineable mineral rights, Ground leases, hunting preserves.Real Estate is a very broad and fun playground

Are mineral rights included, zoning, etc. 

Person who bought it actually has no interest in the land, but the minerals are probably worth 100x what he paid for it.  

Look at Detroit that is still recovering.For me, the primary thing that makes it investing, whether we are using the term for RE, stocks, bonds, futures, mineral rights, commodities, etc., is that the investor performs research to form their opinion.  

A friend of mine rents a room from a couple who own a few (2  I think) parking garages in Philadelphia, PA.

Have you considered investing in oil and gas mineral right royalty funds? 

Another friend had a client who over 20+ years bought land, stripped the mineral rights, and resold the land.

You'd be able to tell (eg mineral build up around the faucet). 

The estimated value of comparable land properties at the shore, covering 3 acres of dry land, has been appraised at an impressive $75 million.Salton Sea is notably recognized for the lithium minerals found in the region.

We received this letter about our mineral rights for a property in Greeley CO.