Land is a great investment, but it comes with it's own unique set of challenges. Here's my two cents:
Pros: 1.) A very low chance of surprises. With houses and other structures you never know what you'll find behind the walls after you close. 2.) It's maintenance free. Land doesn't need painting, a new roof, or a new parking lot. And, there are no tenants to deal with. 3.) You don't have to inspect it. You definitely want to research it, but you don't have to do it in person. Most of your research can be done online and over the phone. 4.) It's the oldest investment. As a lot of people like to say "They aren't making it anymore."
Cons: 1.) It's very hard to determine the value of land. So many factors can affect a parcel's value including topography, soil quality, zoning, history, utility access, road access, shape, etc. I'm working on a parcel right now that has some old graves on it, is bordered on 3 sides by an old landfill, a sewage treatment plant, and a radioactive waste storage facility, and there are 2 homeless squatters who have been camping on it for 5 years. 2.) It doesn't cash flow. Since there are no tenants there is no one to pay rent. However, you can sell it with owner financing and make it cash flow if you want.