Observatory GEOCACHE

A Self-Guided Treasure Hunt

We challenge you to find the hidden Starry Starry Cache on the grounds of the Cincinnati Observatory.  You will need a terrific sense of direction (or a compass or Compass App).  Here are your instructions.  A prize awaits!


A beautiful park like setting, huge rolling lawn. A lot of history! Watch for Muggles, as the Big Dome has eyes. Come back on most Friday Nights and take a PEEK!

1) Stand in front of the larger building at the end of Observatory Place. On the left you should see an old, evergreen tree that lost its TOP. Under that tree you will find the SUN. Stand on it carefully; it is HOT!

The SUN is a hot ball of gases 865,000 miles in diameter, with a surface temperature of 10,000 degrees F. It is about 4.6 billion years old and is 93,000,000 miles or 1 Astronomical Unit (A.U.) from earth. Sunlight takes roughly 8 minutes and 20 seconds to reach Earth, traveling at 186,282 miles per second. Only 2 billionths of the SUN's light reaches the EARTH, the rest is lost in space.


2) Travel now you must - a distance of 2,798,800,000 miles or 30AU's; past the small inner planets, past Jupiter, Saturn, and Uranus to the outer reaches of the solar system to find NEPTUNE.

On the Planet Walk each foot = 8.2 million miles! How many steps is that?

I hope you brought your overcoat! NEPTUNE, at 31,763 miles in diameter, and with a surface temperature of -353 degrees F is one cold place. The blue color isn't water. NEPTUNE’S atmosphere is made up of Hydrogen, Helium, Methane, and Acetylene.

NEPTUNE has four faint rings and fourteen known moons including Naiad, Thalassa, Despina, Galatea, Larissa, Proteus, Triton, and Nereid.


3) From NEPTUNE, on a heading of 49 Degrees travel 95 paces past a tree and then to the edge of the BURNING BUSHES (they're red twice a year).

Then take a heading of 88 Degrees for 55 paces and you will find the twin 1881 MONOLITHS.  What kind of surveying did they do here?  GEODETIC?


4) Now take a heading of 138 Degrees for 38 paces, but don't go around the corner.  Here you need to travel back to 1843 to pay a visit with John, who traveled a long way to Mt. Ida helping to lay the corner stone of the original building. The name of Mt. Ida was later changed to Mt. Adams in honor of his visit.

Neil Armstrong

5) Next, on a heading of 142 Degrees, travel you must, 49 paces to see the man in the moon set in stone.

6) You're almost there but beware as you may be in for a scare - from the cone head with three eyes; proceed cautiously for under its gaze you must search!! If you want a heading, you'll have to work for it and compute (669 x 0.4)-107.6=___°

7) Open the cache carefully to find your Planet Passport Prize and make sure to sign the guestbook.  Then replace everything exactly where you found it for the next space adventurer.