Vibrancy in the image domain seems to come from the presence of a variety of colors enhanced by good lighting. Unfortunately, my pictures of the outdoors do not include a great variety of colors in each of them, but I have sometimes been able to get myself in a good position at the right time to bring something out in the objects being photographed because of lighting.
I had to find the right position to get this vibrant effect in the picture of a tree.
The skies at sunset.
I think there is vibrancy in pictures of flowers in the sunlight.
Autumn is always a good time to try to get pictures of leaves in a vibrant setting.
Other pictures in the vibrant theme can be seen here.
Splattered Brains 
Good captures
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Great series of vibrantly coloured photographs of nature.
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