Hostal San Isidro is a budget-friendly hotel located in the heart of Madrid. The hotel offers comfortable rooms with modern amenities such as air conditioning, free Wi-Fi, and flat-screen TVs. The hotel also has a 24-hour front desk and a tour desk to help guests plan their stay in Madrid. Hostal San Isidro does not require a credit card to make a reservation, making it a great option for travelers on a budget.