Official Paris Map 

Situating the spiders in Paris by folding the map

Cache #1
 Fold the right edge of the map to the left edge, making line A.
 The intersection of the bottom edge with line A is point P.
 Bring point P to the left edge, making line B.
 The intersection of the downward diagonal with line B on the map designates a place where a spider is hidden in Paris.

Cache #2
 Fold the bottom edge of the map to the left edge, making line A.
 The intersection of the top edge with line A is point P.
 Bring point P to the right edge, making line B.
 Fold the top edge to the right edge, making line C.
 The intersection of the bottom edge with line C is point Q.
 Bring the top right corner to the left edge and the right edge to point Q, making line D.
 The intersection of line B with line D on the map designates a place in Paris where a spider is hidden.

Cache #3
 Fold the top edge of the map to the bottom edge, making line A.
 Bring the bottom left corner to the top edge, making line B.
 The intersection of the left edge with line B is point P.
 Form a crease connecting the top right corner with point P, making line C.
 Fold the right edge to line C, making line D.
 The intersection of line A with line D on the map points out a place in Paris where a spider is hidden.

Cache #4
 Fold the right edge of the map to the left edge, making line A.
 The intersection of the top edge with line A is point P.
 Bring point P to the right edge, making line B.
 Bring the bottom left corner to the top edge, making line C.
 Fold the left edge to line C, making line D.
 The intersection of the bottom edge with line D is point Q.
 Bring the top right corner to point Q, making line E.
 The intersection of line B with line E on the map points out a place in Paris where a spider is hidden.

Cache #5
 Fold the right edge of the map to the left edge, making line A.
 Fold the right edge to line A, making line B.
 Bring the top right corner to the bottom left corner, making line C.
 The intersection of the bottom edge with line C is point P.
 Bring the bottom left corner to point P, making line D.
 The intersection of the top edge with line D is point Q.
 Bring the bottom right corner to point Q, making line E.
 The intersection of line B with line E on the map points out a place in Paris where a spider is hidden.

Cache #6
 Bring the top right corner of the map to the bottom left corner, making line A.
 Bring line A onto itself so that the bottom right corner touches the top edge, making line B.
 Fold the top edge to the right edge, making line C.
 The intersection of the bottom edge with line C is point P.
 Fold the right edge to the bottom edge, making line D.
 The intersection of the top edge with line D is point Q.
 Bring point Q to the bottom edge and the left edge to point P, making line E.
 The intersection of line B with line E on the map points out a place in Paris where a spider is hidden.

Cache #7
 Bring the bottom right corner of the map to the top left corner, making line A.
 The intersection of the top edge with line A is point P.
 Bring point P to the right edge, making line B.
 Bring the bottom left corner to the top edge, making line C.
 Fold the right edge to line C, making line D.
 The intersection of line B with line D on the map points out a place in Paris where a spider is hidden.

Cache #8
 Fold the bottom edge of the map to the left edge, making line A.
 Bring the top left corner to line A, making line B.
 Fold the top edge to the bottom edge, making line C.
 The intersection of the right edge with line C is point P.
 Form a crease connecting the top left corner with point P, making line D.
 The intersection of line B with line D on the map points out a place in Paris where a spider is hidden.

Cache #9
 Bring the bottom left corner of the map to the top edge, making line A.
 Fold line A onto itself, making line B through the bottom left corner.
 Fold the top edge to the bottom edge, making line C.
 The intersection of the left edge with line C is point P.
 Bring the bottom left corner to the right edge and point P to the top edge, making line D.
 The intersection of line B with line D on the map points out a place in Paris where a spider is hidden.

Cache #10
 Bring the top right corner of the map to the bottom left corner, making line A.
 Bring the bottom left corner to the top edge, making line B.
 The intersection of the left edge with line B is point P.
 Fold the left edge onto itself, making line C through point P.
 The intersection of line A with line C on the map points out a place in Paris where a spider is hidden.
Early morning in Paris
Project realized with the help of Reference Finder (software by Robert Lang)