A "Secret Passage" is a hidden route or pathway that is not easily visible or accessible to the public. These passages can be found in various locations, such as old buildings, castles, or even in modern homes. They often serve purposes like providing escape routes, connecting different areas discreetly, or hiding valuable items. Historically, secret passages have been associated with spies, treasure hunters, and mystery novels. They can be cleverly concealed behind bookshelves, under floors, or within walls. The allure of secret passages often sparks curiosity and imagination, making them popular elements in stories and films.