Single Huge Stone Like Those at Stonehenge
Puzzle 20 of Team Building Pack
Question is: Single Huge Stone Like Those at Stonehenge
and the answer is: MONOLITH
Word Meaning:
MONOLITH — (also attributively) A large, single block of stone which is a natural feature; or a block of stone or other similar material used in architecture and sculpture, especially one carved into a monument in ancient times.
Definitions from Wiktionary.