Smithsonian National Air and Space Museum.

The last time I've been to this museum was when I was in grade 5 or 6, still living in Korea. On that summer, my family rent a car and traveled the Northeast region of the United States and Canada for the spirit of vacation. Of corse at the time, I was not able to speak English nor felt the need. Although I was not able to read much descriptions nor understand the science , the scale of the museum and the variety of the exhibits totally blew my mind.

It's only been 6 years from that point, but so many things have changed in the meantime. 

Although the exhibits of the museum still fascinated me, I couldn't stop thinking about my past self.