Despite the confusing 'hostal' in the name, León's sumptuous parador is one of the finest hotels in Spain. With palatial rooms fit for royalty and filled with old-world luxury and decor, this is one of the Parador chain's flagship properties. As you'd expect, the service and attention to detail are faultless. It inhabits the landmark Convento de San Marcos.
Although the rooms are actually out the back in a later building, they have full old-world charm and it's worth exploring the public areas.