Related Clues:
- Overgrown, as some walls
- Like Wrigley's walls
- Green on the outside?
- Like college walls
- Unlike rolling stones?
- Like Harvard's walls
- Like some halls or walls
- Like some college buildings' walls
- Like the walls at Wrigley
- Covered with a matted, moist growth, as a forest floor
- What a rolling stone can never be
- Unlike the proverbial rolling stone
- Like old college walls
- Covered with plants, perhaps
- Like many campus buildings