You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Plymouth

Context:
Plymouth is often used as a base by visitors to Dartmoor, the Tamar Valley and the beaches of south-east Cornwall. Kingsand, Cawsand and Whitsand Bay are popular.

Question:
Visitors to what local valley often stop over in Plymouth?

Tamar Valley