Naqsh-e-Jahan Square in Isfahan, Iran, is a magnificent public square dating from the 16th century, and one of the largest in the world. It is also the only one that doubled as a polo field; the goalposts were erected about 500 years ago and still reside at each end. Polo was long the national sport of Iran, replaced more recently by wrestling.
On the square is the Imam Mosque, an exemplary piece of Islamic architecture and the largest in Iran. This corridor leads from the site of an ancient well, now deep within the mosque, to the courtyard, and retains the tiles from the original construction. (Pricing Schedule E)