Obelix's Passion

This multi leads into Frankfurt's far South-West. Preferably you should approach stage 1 by car or bike. Limited parking opportunities are available.

The complete trip totals approx. 3.8 km. All paths can be used at any weather condition. After stage 2 motor vehicles are no longer allowed.

Some notes in regard to the riddles:

1. All coordinates have been taken under fine weather conditions with a maximum deviance of 6m using a Garmin etrex Summit.
2. All N-coordinates start with 50°, all E-coordinates start with 08°.
3. Calculated numbers are in thousandths of minutes and to be added or substracted to /from the previous values according to the specifications.
(Example: given value is N 50° 01.999', the calculated value of X = 102, then N + X equals N 50° 02.101)
4. The values of X and Y must be calculated anew for each stage. All other values are only valid for one riddle, too.
5. The cache is stashed in a small rectangular transparent box, wrapped in a plastic bag.

Stage 1: N 50° 3.982 E 08° 34.309

You are at a crossing of three (!) different means of transportation . To the North-East of the crossing is a small building bearing four digits that indicate in km at what point of the route the building is situated at you are. The four digits are ABCD, then X = ACD - 11.

The four parts used for traffic control can be identified by numbers. You need the numbers for the parts in NW = A, in NE = B, in SE = C, and the part in SW = D. Then Y = CBA.

Hint: The necessary information is easier to find from the South.

Stage 2: N (Stage 1) – X; E (Stage 1) – Y

You are at a place next to a dangerous spot for one of the transportation means whose paths crossed at stage 1. The speed limit is A. Then X = 3*A - 2.

Here you also see a sign post with the name of the path leading to the West. Above there is a number. The digits are ABC. Then Y = ABC/2 - 9.

Stage 3: N (Stage 2) – X; E (Stage 2) – Y

Amazing, but you are actually facing a birthday present. How old would the honoured one have been when the gift was given? The celebrated age is A. Then X = A + 4.
As befits the age of the honoured person, the gift was rather big. What height can be read at a information panel in m? This number is B. Then Y = A/10 * B - 18.

Finale: N (Stage 3) + X; E (Stage 3) – Y

Nearly finished! You are facing an object that enables you to reflect. Go 60 steps in direction EES and 10 steps to SSW. Look for the „trident“!

By the way, you are near a building belonging to the finest of its kind and function. A real juwel. Unfortunately it can only be viewed from the outside.
Following the first path to the left approx. 50m after the cache in direction North-East („Tunnelweg“) you will easily find your way back to where you started.