There is a popular notion that cleanliness is an important part of the Islamic faith, though you wouldn't know it from walking around Jordan. I have never seen people throw coffee cups, half-eaten sandwiches, tissues, etc on the street so carelessly — and often times with such finesse — as here in Jordan.
There are apparently two arches built around 130 CE to honor Roman Emperor Hadrian—one in Athens and one in Jerash. The former is undoubtedly more studied, but the latter is objectively more beautiful! Maybe it's the color of the stones in the afternoon light, the unconventional architectural features, or just the sheer size of it.
Jordan's location in the geographical “near east” has exposed the country to dozens of civilizations over the course of history. Over the last three thousand years alone this region has experienced the coming and going of the Persian, Greek, Roman, Nabataean, Byzantine, and Ottoman — to name a few — empires, the legacies of which are often still visible today.