Who built La Ciudad Encantada (The Enchanted City) in Castilla-La Mancha, Spain?

Question

The 50.5 km Channel Tunnel, built under the English Channel or, in France, La Manche, to link the UK and France with road and rail access was finally opened in 1994. When was the first official Anglo-French protocol established to create the railway aspect of the link?

Answer 1

No-one, it is a natural phenomenon
The "City" is a karst formation, where over about 90 million years a soft limestone upper layer has dissolved and weathered around an irregular dolomite core or base. The towering, fantastic shapes which result have featured in several films, including the 1989 Bond film "The World is Not Enough".