Split level stations

[Joseph_Pestell]

You don't have to go quite as far across the water if you don't want to. There is a stretch of the Paris Metro where lines 8 and 9 run directly one above the other beneath Avenue St Martin. There's even a complete double deck closed station down there too.

 

http://www.silentuk.com/?p=1295

 

I think the OP might want a model where the trains can be seen (and perhaps a greater variety of trains)

 

All the stations along this part of Lines 8 & 9, are very close together and all have entrances/exits at both ends of the platforms. That has the startling result that on the surface, entrances to adjacent stations are closer together than entrances to the same station.

[AndyB]

Many fond memories of trips on the Paris Metro as a youth.

However, my interest is really in British railways, particularly the 1970s. 

Best, Andy

[Satan's Goldfish]

Probably doesn't quite fit the bill and i've not seen it mentioned in this thread yet, but North Walsham on what is now 'The Bittern Line' in Norfolk is an example i've always liked, there is a bit of a goods yard between the 2 stations though (If you Google Earth it, the second station used to be where the oil depot is now). Roughly parallel, different levels, some good junction action at each end with one of the redundant M&GN lines leaving under the remaining line, the bridge still exists in the middle of a park.
 

http://www.berneyarms.co.uk/html/yarmouth/rail/mandgntour/mandgn_honing_nthwalsh.htm

 

Info and pictures can be scarce, but the link above has an old map. The only line remaining is the roughly straight south to north route.