The similarities abound. We are just outside the fence of the "secretive" government facility trying to explore and contact alien life. A silent voice from the upside down will give us cryptic messages on a wall. The portal you seek will be just where you'd expect it.
You are looking for a large plastic Geocaching container filled with a log book, pencil, first finder's prize, high quality treasures, tradables and trackables. This is a Travel Bug Motel. Once found, it will be an easy in and out. This spot is a shady seat near running water. You could picnic here year round and venture off in nearly every direction. Please rehide the cache as found. Caution: watch your footing parts of the trail can be slippery.
About this Area:
Hahamongna is that rare spot in the Arroyo Seco at the foot of the San Gabriel Mountains where the mountainous watershed meets the urban plain. Periodically floods roar into this basin. Bounded on the north by the mountains and Jet Propulsion Laboratory and on the south by Devil's Gate Dam, Hahamongna contains five unique habitat zones that only exist in alluvial canyons near the mountains. Most sites like this in Southern California have been destroyed.
About JPL (from Wikipedia):
The Jet Propulsion Laboratory (JPL) is a federally funded research and development center and NASA field center in La Cañada Flintridge, California and Pasadena, California,[1] United States.
The JPL is owned by NASA and managed by the nearby California Institute of Technology (Caltech) for NASA. The laboratory's primary function is the construction and operation of planetary robotic spacecraft, though it also conducts Earth-orbit and astronomy missions. It is also responsible for operating NASA's Deep Space Network.
Among the laboratory's major active projects are the Mars Science Laboratory mission (which includes the Curiosity rover), the Mars Exploration Rover Opportunity, the Mars Reconnaissance Orbiter, the Dawn mission to the dwarf planet Ceres and asteroid Vesta, the Juno spacecraft orbiting Jupiter, the NuSTAR X-ray telescope, and the Spitzer Space Telescope. It is also responsible for managing the JPL Small-Body Database, and provides physical data and lists of publications for all known small Solar System bodies.
The JPL's Space Flight Operations Facility and Twenty-Five-Foot Space Simulator are designated National Historic Landmarks.