Echoes sing within, A hidden mouth of the earth, Secrets carved in stone.

Without a castle I’d be a pond. Without following my path you’d surely come to harm. With walls and water I guard the way, with many watchmen keeping intruders at bay.

A savory bottle from town With a name that can make a man frown Though the letters are plenty The sounds are but twenty Its the trickiest sauce to gulp down

Mu first three, a container most preservative. My last three, sounds like a contagious sleep signal. Put both together and in some places I am grand. A deep crevasse, a scar on the motherland.

I twist and turn, I wind and bend, from start to stop, I guide your end. Cars and feet upon me meet, what am I, that runs beneath your feet?