Possible Clues:

• Standing stone
• Large single upright block of stone
• Obelisk, say
• Monument carved from a single stone
• Single great stone, column or obelisk say
• A large single upright block of stone
• Tall building I look to go up in August?
• Stone block with solid middle installed in part of year
• Large standing stone
• Single stone in the form of an obelisk, say