Visiting Mexico City by bus: the "Turibus"
This is a double decker panoramic bus that makes a great tour comprising the most popular tourist spots in Mexico City (original tour goes through Downtown, Zona Rosa, Condesa, Polanco, Chapultepec -- but a new route has been opened, more info below) with an European concept: ticket valid all day long and the opportunity to get on and off the bus as many times as you want at any of the fixed bus stops.
You can buy tickets valid for 1, 2 or 3 (consecutive) days, and the children and senior citizens get a special discounted price. The regular price for a 1 day ticket is $125 MXN (about USD $10) on weekdays and $145 MXN on weekends and holidays - per person. If you buy 2 or 3 day passes the daily fare is cheaper, of course.
The entire tour takes about 3 hours (without getting off the bus), but it could be longer because of the traffic and depending on the time of the day you take it. They have a recorded description of the whole tour and important spots/monuments along the way in 6 different languages: spanish, english, french, german, italian and japanese (and you can see a brief paragraph with the main terms & conditions of the tour at their website in these languages as well -- URL provided below), ear phones and small maps with the routes and bus stops are provided on board and are included in the ticket fee (see picture of the maps: these are sponsored so you can get discounts in some places with them, such as the Torre Latinoamericana). The Turibus used to have only 1 route but a second one has been opened recently, as well as a night tour on weekends. The new route goes through some of our main attractions/neighborhoods in the southern part of the city, such as Coyoacan, San Angel and the National University area. All tickets are valid for both routes, so you can make a whole 5-6 hour tour through most part of the city for the price of a single ticket. Good deal uh!? The night tour is more expensive (it's purchased separately) and runs from 9 PM to 3 AM, THU-SAT.
I haven't tried the new route yet, but I took the original tour and loved it. You really get to see some of our nicest streets, buildings and monuments and get a general feeling of what the city is like. Plus, you can use this bus as a means of transportation between any important spots you plan to visit and thus save $$ in taxi rides. The bus runs from 9 AM to 9 PM, Monday through Sunday. Keep in mind though: once you leave the bus you might have to wait for the next one to pass by for around 30-45 mins. On the 2nd route the waiting time in between buses is longer.
The original tour starts at the Auditorio Nacional in Chaultepec/Reforma area, but you can hop in at any of the fixed stops - marked with a poster - and buy your ticket on board, and if you get down and ride a different bus later you just show your ticket & wrist band to the staff.
For further details you can visit:
The official site (first URL) is now updated with info about the newest route and has an English version....... The second one makes a very brief description of both routes and is only in Spanish.