Tip: Notice how the first bridge has almost the same color as the chasm. This increases the fragility and vulnerability of the first bridge. The second bridge is golden, richly ornate  and illuminated with bright yellow lights. This contrast in color and lighting makes the distinction between both bridges not only visible but also more memorable.

One observation: even though the first bridge is remarkably similar in color to the rock, I managed to keep it's readability by using the fog control in a way that the rock would be in the fog, but not the bridge. Notice how it has a little bit more contrast than the rest of the chasm.

Second bridge: golden and contrasting.