Butler Corridor 

The approach given for Butler Corridor above is not the best alternative (meaning you really don't want to go that way).

If you are trying to reach routes in the main Corridor (ie: Secret of Mother Butler, Viper, etc.), it is best to continue east in the wash past the Red Obelisk until you can see the southern side of the Corridor (Eiffel Tower and Kokopelli Wall) continue east until you can head well around the eastern side of these formations and then back west and up to the northern side. Enter through the northern side of the Corridor.

For approaching Eiffel Tower, The best approach for the Eiffel Tower is to hike to the base of the southern entrance to Butler Corridor.

To reach the southern end of Butler Corridor, from the vicinity of the Red Obelisk, continue east for 25 yards. Now either:
(1) Turn left and take Prickly Pear Canyon north for about 20 yards, until you can cut right (east) over fairly level ground until you drop into a wash emanating from the Butler Corridor; or
(2) Continue east from the Red Obelisk in the main wash for another 100+ yards, and until you can circle around low rocks on your left and reach the southern entrance from the southeast.

Once below the southern entrance to the Butler Corridor, there is much vegetation and cacti. Stay to the far right of the gully, and scramble up boulders, staying on the right until you are just in the Butler Corridor. Once in the corridor, head left up to the base of the Eiffel Tower.