2. The visitors Since it opened in 1889, almost 250 million visitors have come to see the tower. TToday, it welcomes almost 7 million visitors a year, 75 percent of whom are foreigners, making it the most visited monument that you have to pay for in the world. A study done by Client Watchdog asked 5,000 visitors about who they visit the tower with, and reported that 3 percent said they visit alone, 18.1 percent visit with friends, and 30 percent said they visit with an organized group. The most popular response was visiting with family, which was made up of 48.9 percent of visitors.