Since December 2007, I started to realize a new miniature train circuit which is worthy of this name, instead of a first network realized ten years ago and which had remained suspended because few satisfactory.
This circuit has 4 levels:

2 levels hidden rollover with sidings loops
1 level of parade with a village and a small main station served by a great line and a secondary line pinion leading to level 4 in the mountains.

Scale: HO
Brand: Fleischmann