The hook
A quarter-mile corridor of Monterey cypress, planted around 1930, leads to a white Art Deco radio station that took down the first West Coast word of Pearl Harbor — and still taps out Morse code today.
01Why it's worth it
The tunnel itself is the Instagram magnet: two rows of cypress grown into a green cathedral arch over the road to the old RCA receiving station. But the reason it earns depth is what waits at the end. KPH was one of the great maritime wireless stations, RCA's link across the North Pacific, and the receiving site here (built 1929–31) caught ship-to-shore traffic for most of the 20th century — including, in 1941, being among the first to receive and relay news of the attack on Pearl Harbor. When satellites made it obsolete, volunteers refused to let it die: it is now North America's only surviving Morse-code coast station, still on the air, and on open Saturdays you can watch operators send code by hand in a room of humming vacuum tubes. Tunnel for the photo, station for the goosebumps.
02How to experience it
Sir Francis Drake Blvd toward the Point Reyes lighthouse — the tunnel and its lot are marked. Go early to beat the photographers. Check the Maritime Radio Historical Society schedule for KPH open days (often Saturdays); catching a live transmission is the deep version. Folds into any Point Reyes lighthouse-and-elk day.