A friend of mine took me here for a belated birthday dinner. Los Tios is located in the Market Square in Leesburg, same shopping complex as the Tuscarora restaurant. The restaurant is small but cozy. We started off with the largest margaritas I have ever seen. I felt like I was drinking literally out of a fish bowl but of course was much tastier. They brought out a basket of chips with salsa. The chips are thin and very crispy. The salsa was a little liquidy but very tasty. My friend ordered mahi mahi fish tacos which she claimed were delicious. I ordered the beef fajitas. They were delicious! The meat was tender and spiced perfectly. They are cooked up with the standard onions and peppers. They garnish them with a nice handful of cilantro, which I love. Of course if you are not a fan make sure to have them leave it out. I noticed that there is outside seating which might be nice in the warmer weather. The only thing about the smallness of the restaurant that bothered me was that everyone was ordering fajitas and I didn't feel that the ventilation was very good. I was breathing in the smokiness of others fajita orders. I would definitely come back to Los Tios in spite of this though.