Airbnb is a great option for accommodations when you travel. Staying with a host means getting a more local experience and gaining some insight into the culture, and Airbnb is often cheaper than hotels, making it popular for budget travel. Plus, many properties are really unusual and interesting, like tipis, cabanas, treehouses, yurts, and more. Check out our list of 15 totally unique Airbnb rentals that are under $50.