Layers
Imagine without the foreground mountains… or maybe there IS a mountain range somewhere in the Great City: http://fc09.deviantart.net/fs29/f/2008/057/0/8/Fantasy_City___Closer_look_by_MiG_05.jpg
Tower Neighborhood
A pinnacle neighborhood built directly covering an entire heights neighborhood: http://lordoffog.deviantart.com/gallery/26931165#/d3esim5
Same with bridge to another heights area: http://lordoffog.deviantart.com/gallery/26931165#/d2oet8m
View from the Pinnacles
Oh Yes, this is totally a scene from one of the pinnacles of the city: http://browse.deviantart.com/?q=fantasy%20city&order=9&offset=24#/d31yf52
Stormy Pinnacles
A storm brews amongst the pinnacles: http://browse.deviantart.com/?q=fantasy%20city&order=9&offset=216#/d3lerup
Closing In
As the rooftop neighborhoods build on each other, they rise up into towers, obscuring the rooftop until eventually becomes roof and chasms: http://browse.deviantart.com/digitalart/paintings/fantasy/?qh=§ion=&q=city#/d23z3ul
Rooftop Rise
A heights district raised up above the rooftops: http://browse.deviantart.com/?q=fantasy%20city&order=9&offset=240#/d3eol10
Upper Mid Strata
A good perspective showing rooftops, roofs, and chasms: http://browse.deviantart.com/?q=fantasy%20city&order=9&offset=264#/d32ovx4
Even better: http://lordoffog.deviantart.com/gallery/26931165#/d37s0kn
Trickle-down Aquatics
An evening view of a water feature as it cascades down from a heights neighborhood, down to the rooftops, and down into a chasm amongst the roofs: http://browse.deviantart.com/?q=fantasy%20city&order=9&offset=264#/d26h128
Roof Strata Light
On bright days, the roof strata can be quite well lit like this: http://browse.deviantart.com/?qh=§ion=&q=ancient+interior#/d1ftmw3
Roof strata interiors can, however, also be dim, even when there are skylights present: http://browse.deviantart.com/?q=skylight&order=9&offset=120#/d15uq62
Skylights range from very simple to very complex stained glass: http://browse.deviantart.com/?q=skylight&order=9&offset=120#/d8xzi1
Life in the Chasms
A little too high-tech looking, but structurally spot on, here's the view from a relatively open chasm area, with heights and pinnacles in the background: http://browse.deviantart.com/?q=fantasy%20city&order=9&offset=192#/d46nrf9
Warrens Cavern
Sometimes the warrens open up into large spaces. Here's a very nice warrens neighborhood. Please ignore the blimp. Note the chasms above:http://lordoffog.deviantart.com/gallery/26931165#/d48xmdy
Tumbledown Shop
Down in the underneath, this was once a prosperous shop in the sun some centuries ago: http://browse.deviantart.com/?qh=§ion=&q=underground+ruin#/d4oasvw
But some of these ancient alcoves are still occupied, down in the dark, like this shop: http://browse.deviantart.com/?q=underground&order=9&offset=192#/d3cy0e2
The Way Down
Entering the Depths, most everything is in a state of crumbling decay: http://browse.deviantart.com/?q=underground%20ruin&order=9&offset=24#/d2fq7ry
Some people head into the Depths searching for adventures: http://browse.deviantart.com/?q=underground%20ruin&order=9&offset=24#/d1abwbk
Depths Stalls
Imagine ancient spells of light still persist in what were once stalls of a marketplace: http://browse.deviantart.com/?q=underground%20ruin&order=9&offset=120#/dcjx1u
Old Temple
Often the Depths have standing water that comes down from above during rainstorms or just as the result of sewage being shunted below: http://browse.deviantart.com/?q=underground&order=9&offset=96#/ducml8
Into the Earth
Below the city depths are the deeps, places that were actually under the original city. This place was a mine: http://browse.deviantart.com/?qh=§ion=&q=underground#/d4ae7g3
