Answer:

pyramids

Answer	Crossword Clue
PYRAMIDS	Increases rapidly
PYRAMIDS	Giza sights
PYRAMIDS	Giza attractions

PYRAMIDS	Tourist attractions in Egypt
PYRAMIDS	Wonders of Gizeh.
PYRAMIDS	Heaps up
PYRAMIDS	Some royal tombs
PYRAMIDS	Gets bigger and bigger
PYRAMIDS	Saqqara attractions
PYRAMIDS	Giza sight
PYRAMIDS	Cheops creation