The vineyards scattered along the banks of the Gironde estuary are responsible for producing some of the greatest, most sought-after and long-lived wines in the world. While the legendary first growths need no introduction, there is a huge amount of wine beneath the tip of the of the iceberg. From second and third growths to Bordeaux superior and beyond, Bordeaux's varied terroirs offer far more diversity and stylistic differences than one might think. While the big houses are now owned by multi-national companies, there are still plenty of smaller, estates carving out authentic wines amidst the big boys, many with younger generations now at the helm.