Private railway, Tahoe

After Gloria and found our way back from getting lost on a hike near Fallen Leaf Lake, we stopped for a moment next to a high fence. I looked through a gap in the fence and saw that the waterfront house behind it had some kind of elevated swooping railway built between its garage—at the road level we were standing on—and the house itself (much lower, at the level of the lake).

The photo shows the portion of the railway nearest the garage. The railway is relatively flat and straight here. As it continues to the right, off the photo edge, it curves down and to the left like a unbanked roller coaster.

yabbadabba suffix tree

10: a
 7: abba
 2: abbadabba
 5: adabba
 9: ba
 4: badabba
 8: bba
 3: bbadabba
 6: dabba
 1: yabbadabba

     |(1:yabbadabba)|leaf
tree:|
     |     |(3:bbadabba)|leaf
     |(2:a)|
     |     |(6:dabba)|leaf
     |
     |     |(4:badabba)|leaf
     |(3:b)|
     |     |(5:adabba)|leaf
     |
     |(6:dabba)|leaf
3 branching nodes

[ WTF? ]