World so Big

Someone I know, is now on an exchange programme in Czech Republic. Prior, toured London, Paris, Amsterdam.When I look at the photos, I realised that 世界is very big and we humans are just so 渺小。No wonder, people choose to tour or roam the world in this lifetime to see how big the world is.  For me, furthest I travelled to was USA for my honeymoon. After that, I have remained in Spore cos of other priorities and family. Oh yeah, since then, I have been to Brunei, Hong Kong.  I guess everyone has their own priorities.   As my wife puts it, I am not unable to let go, and thus, I have not been really happy.