Strasbourg Notre Dame Cathedral is one of the biggest cathedrals in France and become the main attraction in Strasbourg and Alsace region. Visited by millions visitor every year, the summer time draws biggest crowd with very long lines to get into the cathedral. Inside the church is so grand and sacred with ornaments, stained glass and huge altars dominate the church interior. The famous clock is still working well even if it ages more than hundreds years old. Outside the square filled with crowd and make it difficult to take picture. Just for your info, Strasbourg cathedral is the tallest cathedral in France, so you better figure out how to take the whole cathedral.