Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: Disused railway tunnels lie dormant across the Welsh landscape, but there are some who want to breathe new life into them. Should these dark and dingy passageways be left sealed up or could they be an untapped resource for tourism and commuting?

Are Wales' disused railway tunnels an untapped resource for tourism?