The free walking tour of Mexico City can range from 2-4 hours. After the end of the whole group, you can pay for the tip of the tour. After all, the tour guide has worked hard to show you the city. We have a good experience and it is very appropriate to give proper return. The standard for general guide tipping is 5-10/person, thank you and pay at the end of the journey. If you have to leave the group early, remember to give the tip to the tour guide first (you can give less due to the departure time). During the walking tour, the tour guide pointed to the "Latin American Building" and we said that this is the tallest building in Mexico City and escaped a year 7 Great earthquake! Later we found a time to land here! Unlike the city's tallest building ascending project (such as Taipei 101), the Latin American building is completely free! You can consult the elevator attendant here and tell them that you need to have a drink at the top of the building and they will tell you the corresponding floor number. The viewing area has floors for exhibition rooms that do not require consumption, as well as restaurants and bars. We chose to have a drink at the bar and have some snacks. A bottle of beer is about 40 yuan, and a cheese fries is less than 30 yuan. This is the city's tallest building! The price is too high.