It would appear to be the ones put up in San Mateo, Rizal, The Philippines.
The largest ten commandments tablet was presented to Guinness World
Records at HalleluYAH Prayer Mountain For All Nations in San Mateo,
Rizal, Philippines on April 11, 2009. The tablet measured 65.04 square
meters (700.08 square ft), organized by Sister Grace Galindez-Gupana,
a businesswoman and founder of the HalleluYAH Prophetic Global
Foundation. The tablet is located on top of HalleluYAH Prayer Mountain
and can be seen from the road.
Photos on the page seem to match the one you show, although theirs was taken when the tablets were new - they've clearly been around a few years in the photo you provide.