“In the desert you can remember your name”.
not Waldo Emerson quote but great lyrics of rock group America
The NASA Shuttle Carrier aircraft 747-100 I boarded at Edwards AFB in 2006. Admittedly it was on the flight-line stationary.
It’s almost as impressive as the machines that hitched a ride on top. There are two 747 Carriers for this purpose and they were built 10 years before STS. They will likely have operational service to perform into the future. The Shuttle regrettably won’t.