6. Si-o-se Pol, Isfahan, Iran
Si-o-se Pol, which means the Bridge of 33 Arches, has stood in Isfahan, Iran, since the 17th century. Spanning the river Zayandeh Rud, it's one of 11 bridges in Isfahan. It's one of the most famous examples of Safavid bridge design although Khadjou Bridge is considered to be more beautiful.
There are two rows of 33 arches and its yellow brick and limestone masonry give it that buttery softness that, when the sun hits, makes it appear to melt into the river. It's a charming bridge of alcoves, where you can sit and admire the view. Or, in the tea house, sip cups of steaming tea.