Cartagena with Lee & Judy

You start off going through a modern door in a city entre building, but this cannot really prepare you for what's ahead.
You travel through the museum and up a set of escalators and suddenly you're in a Roman theatre. The theatre is a mix of the original and restored pieces and gives a good indication of what the theatre was originally like.

http://en.wikipedia.org/wiki/Roman_theatre,_Cartagena