Free images results:

Obelisk pictures, stock photos and images


Obelisk Stock Photo
Author: Slidepix
Obelisk Stock Photos
Author: Slidepix

Also, here are some commercial RF-licensed images that match your search criteria:  
Obelisk Royalty Free Stock Photo
Author: Cerae
Obelisk Royalty Free Stock Photos
Author: Waiheng
Obelisk Stock Image
Author: Igor1986