All this talk about Denver and tunnels perked my interest to go looking.
What are tunnels? Conduits thru which things pass.
40,000 ft. view using Google Earth.
Missing [I] in many Q drops.
I-70 has a part missing, when viewed from above, at the Eisenhower Tunnel.
What did I find [near] there?
Keystone Resort
Lots of symbolism there, including Area 51.
Check out the trail names.
https://www.keystoneresort.com/
https://assets.vailresorts.com/-/media/keystone/files/key1819trailmap.ashx
Includes a notice to ski [SMART]. re: POTUS use of SMART in some tweets.