I have yet another new country for this third day of Week Around the World: Malta. This card comes from Agi, who lives in Croatia but was visiting Malta.
Mnajdra is a megalithic temple complex that was inscribed on the World Heritage list in 1992. The temples were built in the 4th millenium BCE, which makes them one of the oldest religious sites on Earth.
I do not know what the stamp shows, but it is interesting:
Tomorrow, the country of the day is India.