3 Must-See Hop-off AttractionsPorto has so much to offer. If you're not sure which attractions are worth visiting then be sure to hop-off at these wonderful locations. Take the Red Line and hop-off at Bus Stop 11 to take in the sensational architecture of the Sé Catedral, also known as the Porto Cathedral. It's one of Porto's oldest landmarks. At Bus Stop 1 of the Blue Line, you'll find yourself by the Torre dos Clérigos, a tall, elegant bell tower that's visible from all over the city! Further along the Blue Line at Bus Stop 10 is the Museu do Vinho de Porto, a port wine museum, perfect for those avid wine lovers! You'll learn all about where it comes from, how it's made and how the process has been developed over generations.