Nearby where I live you will find the Wilburton Trestle - a historic wooden railway trestle that measures over 100 feet high and almost 1,000 feet long. The trestle was originally built in 1904 and has served many purposes during its life. Freight trains carrying Boeing's aircraft fuselages to its assembly plant in Renton used to cross the trestle 6 days a week.
I have always thought the GeoTrax railway system needed a good trestle. Apparently, I am not the only one to think this. In fact, recently a creative GeoTrax enthusiast built a trestle for his son's GeoTrax set.
The video includes some instructions on how he went about building this and at the end offers an email address you can contact for plans. The final result is amazing and it only cost him about $20 to build. Enjoy!!!