This is a nice map made with WorldPainter.
It has many craters, as well as hills.

You spawn inside your small space ship to explore the moon.
From now on you have all possibilities! Do what you want! Build your colony! Have fun!

This is a mountainous world created using world painter. The border between generated terrain and natural terrain are seamless. You spawn in a river valley between mountain ranges. Can you survive this harsh world?

I made a layered map with a variety of tree sizes! I used Worldpainter and MCedit to craft this landscape. The trees below the canopy are from a tree schematic pack by lentebriesje. I used a schematic of an epic forest someone made a while back for the main stand of huge trees. I used a cleaned up schematic of a mega tree from another map i found a while back for the MEGA trees, which i made by layering multiple trees together.
I also hid a little book in the map where i tried out writing a small dramatic story thing. Enjoy
Tree links:
original main stand: https://web.archive.org/web/2020/http://www.minecraftworldmap.com/worlds/LYgIM
tree pack (compatible with WorldPainter): http://www.planetminecraft.com/project/native-trees-of-europe-template-repository-1779952/
Unfortunately i don't remember where i found the original mega tree. :/

This is the supercontinent Pangea, that existed 200 million years ago on Earth. It's remade in Minecraft as a huge (ca. 20000x20000 blocks) SMP map. The terrain is made in World Machine. It contains all 1.7/1.8 biomes, except for Mushroom Island, and they're populated in Vanilla Minecraft, instead of WorldPainter. WorldPainter is used on this map as a port for the terrain and to paint the biomes.

This is named after the huge mountain in GTA: San Andreas.
This world does have a huge mountain. Furthermore, there are amazing caves and fantastic ravines to explore. On the surface are nice forests, too, as well as a NPC village not far from spawn.

In this world you are given a house to start.
Have fun!