macau window

Through the Macau window, the sky is so light, light blue or almost white.

I feel sun shining directly on my head, since this window is a part of great ruins of St. Paul's, which is well known as just a remained facade. So, I mean, both sides of this window are completely outside.

I wonder what's the definition of a "window".

Looking "outside" through this window, we can find the remarkable contrast between the afterglows of Portuguese heritages, including below the busy street with several souvenir shops and sweet egg-tart stands, and emerging modern buildings over there.

Here is Macau, SAR of China.