More Strangers

I've found some more pics which seem to qualify for Thematic Photographic's 'Strangers' theme.
First, two shots of ceremonial guards at the Mausoleum of Ataturk, in Ankara, Turkey:

 

These people are engrossed in what the guide is saying at the National Museum in the same city:

 

A group of friends playing a Spanish version of boules in Barcelona:

"Good things happen when you meet strangers."   ~Yo-Yo Ma