9. Chartres Cathedral and Laon Cathedral/Riverside Church
Chartres Cathedral was constructed between 1193 and 1250 and is considered one of the finest examples of the High Gothic style. It is well known for its stained glass windows and labyrinth.
The Laon Cathedral was constructed between 1160 and 1230. It is another prime example of Gothic architecture and only four of its six towers are complete.
Riverside Church, which is the tallest church in the United States, owes its existence to John D. Rockefeller. Allen, Pelton and Collens was inspired by Chartres and Laon in their design for the church.