Mesmerizing. Most modern planes are built the same way, from turboprop commuters to super jumbos. But the 737 is a great example because they roll off the line about every 18 hours.
Planes are still completely fascinating to me. Behind the sad facade of commercial travel and its cattle calls, beatdowns, and terrible companies, the technology here is just amazing. And safe.
If you don’t have a flight tracker on your phone, I recommend it. Every time you see something overhead you can instantly learn its story. Or go watch Memphis departures late at night, when hundreds of Fedex planes take off one after the other and light up the radar.