Food, Cooked, Pizza, Whole round vegetarian pizza on a white background.

Food, Cooked, Pizza, Whole round pepperoni pizza with a slice cut out on a white background.

Food, Cooked, Pizza, Whole round pepperoni pizza on a white background.

Food, Cooked, Pizza, Whole round hot jalapeno chilli pepper meat feast pizza with a slice cut out on a white background.

Food, Cooked, Pizza, Whole round hot jalapeno chilli pepper meat feast pizza on a white background.

Food, Cooking, Preparation, Circular wooden pizza board with a handle on a white background.

Spain, Extremadura, Caceres, No Entry sign against typical brick wall.

Mexico, Veracruz, Circular fountain in foreground of the Customs House.

Italy, Sicily, Piazza Del Duomo, Messina Cathedral, Astronomical clock on clock tower.

Italy, Sicily, Piazza Del Duomo, Messina Cathedral, Astronomical clock on clock tower.

Ireland, County Donegal, Grianan of Aileach ring fort circa 1000AD, overlooking Inishowen.

Ireland, County Donegal, Grianan of Aileach ring fort circa 1000AD.