St. Joseph's Cathedral is a stunning example of French colonial architecture and one of the oldest churches in Hanoi. Located in the heart of the Old Quarter, the cathedral is a popular landmark and a place of worship for the Catholic community. The grand facade, stained glass windows, and towering spires make it a picturesque spot for photography. Inside, you can admire the beautiful interior and attend a mass if you wish. Surrounding the cathedral are charming cafes and shops, perfect for a leisurely stroll after your visit.