• Anything south of 60°N in Alaska
• Seattle-Spokane (KSEA/KGEG
• Seattle-Bend (KSEA/KRDM) I’d recommend a scenic loop around Mount Rainier
•San Francisco-Medford (KSFO/KMFR) has you fly right past Mount Shasta which is incredible and over the uniquely named towns of Yreka and Weed before making a visual or RNP approach that weaves through a canyon.
Like others have said KMMH, KJAC, KSUN, KTRK are all stunning mountain spots with shorter runways.
Kicking the autopilot off and circling into Palm Springs under the peaks that rise nearly 11,000 feet above you is certainly a fun challenge.
Telluride is a fun spot as it’s the highest commercial airport the country, and Aspen’s LOC DME 15 is one of the steepest in the world.
And finally anything in, or between Hawaii, and Guam is worth checking out!
Don’t listen to @unicorn, obviously there are great places around the world, but the US+territories is simply unmatched in terms of variety