Caves don't conform to standard lengths. You'd have to find a cavers' guide-book or cave-index to find information like that.
As for the Loire valley, I don't know if it has any natural caves (though it is in limestone), but it seems to be noted for artificial caves dug to create homes.
The Loire isn't a lake, but France's longest river (1013 km - 629 miles). Another point other that its length, is that the Loire valley around Tours is listed as a world heritage site, due to the numerous, beautiful renaissance castles lining the valley.
Muscadet is one dry white wine of the Loire Valley.
The Loire Valley in France
the loire valley located in centrel france about 800 kilometers form loire river great place for dating and camping and too for enjoy the amazing view
Between the Loire valley and the Eiffel tower you have a two and a half hours drive.
The Loire Valley is not a French town, but rather a region in central France known for its picturesque landscapes, historic chateaux, and vineyards. It is a popular tourist destination for its cultural and natural beauty.
The Loire valley is pretty big, but it takes about an hour by train to get to the city of Tours and about the same by car to get to the city of Orléans.
their amazing wines
how many castles are in the Loire Valley
Anjou
The French city located in the center of the Loire Valley is Tours. Known for its rich history and vibrant culture, Tours serves as a gateway to the region's famous châteaux and vineyards. The city also features a charming old town and a lively atmosphere, making it a popular destination for visitors exploring the Loire Valley.
The best way to travel from Paris to the Loire Valley is by taking a train. Trains are fast, convenient, and offer beautiful views of the French countryside along the way. You can catch a train from Paris to cities like Tours or Blois in the Loire Valley, and then explore the region by renting a car or taking local transportation.