If the idea of sampling the cooking of masterchef Martín Berasategui 20m underground sounds appealing, then El Hilo de Ariadna, an incredible 15C maze-like bodega hidden away in the town of Rueda in Valladolid province, is definitely the place for you. Here, the delicate, contemporary and ever consistent à la carte is always centred on the best possible ingredients and is complemented by wines produced by the Yllera family (the owners of the cellar). Interesting wine-focused activities are also available.