Lyon's massive St. John's Cathedral (Cathédrale Saint-Jean-Baptiste, to be precise) dates back over 900 years, making it one of the city's most historic landmarks. Towering 33 meters (108 ft) at its highest point, the edifice itself is an incredibly impressive feat of Gothic architecture, especially when illuminated during Lyon's festival of lights. Once inside the church, artifacts like the 13th century crucifixes flanking the altar, magnificent stained glass windows and a 14th century astronomical clock make for an enlightening investigation, on top of all that refreshing spiritual tranquility.
Location:70 rue St. Jean, Lyon
Note:It doesn't hurt that the cathedral is located smack dab in the middle of Vieux Lyon, which is prime cultural real estate in its own right. After your visit, just head north on Rue Saint-Jean and you'll inevitably find a place to sit, grab a dink and appreciate the historic surroundings.