Yes, Foz do Iguacu is definitely worth visiting! It is home to the spectacular Iguazu Falls, one of the largest and most impressive waterfalls in the world. The area also offers a range of activities, such as nature walks, bird watching, and hikes, as well as tours of the local waterfalls and rainforest. You can also explore the culture and history of the area, with museums, churches, and other attractions.