Kilometer Zero: This Level marks the geographical Heart of Spain and also the start line for measuring the region’s 6 national streets. Seek out the plaque on the bottom beside the Write-up Business office building. This is a component from the Royal Palace but we've been mentioning it independently as https://www.kinship.co.uk/dog-lifestyle/what-to-do-with-your-dog-when-you-go-away-on-holiday