There are a few old favorites, and still lots of falling structures and spiral towers:

And of course you can climb up a lucky tower, or explore the depths of the spiral dungeon and brave the boss at the end:

And there are a couple new structures too...

There are also some new things, with a couple required mods. For instance, you can get killed by yourself who is even wearing a helmet:

Find a few little fish:

Get some useful Tinker's Construct metals and items (and even if you can't use the metals for anything, you can still make your blocks luckier with them!):

Even get some epic weapons and tools:

And get trapped in some pretty strange liquids:

By PopularMMOs:

By Creeperism:

Old:

By Wandering Soul of Time (Akitori)

Video: (by myself)

These instructions are in the download, but I'll put them here too:

• First install Minecraft for 1.7.10, Forge, and the regular Lucky Block mod. If you don't know how, there are many tutorials online.

• Also install:
  •  Loot++
    • version 0.19 or higher
    • http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/2290059-loot-the-addon-update-now-with-the-ability-to
  • Headcrumbs
    • version 1.6.2 or higher
    • http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/2184837-headcrumbs-celebrities-heads-as-dungeon-loot-heads
  • Just a Few Fish
    • version 1.2 or higher
    • http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/2508671-just-a-few-fish-version-1-2
  • Ruins
    • latest version for 1.7
    • http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1282339-ruins-structure-spawning-system
  • Tinker's Construct
    • version 1.8.7 or higher
    • http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/2218638-tinkers-construct
    • You'll also need it's core mod, Mantle, which should have a download on the same page.
• Rename your lucky block mod file to have a z in front of it... So it was "[1-7-10]_Lucky_Block_v5-1-0.jar" before, you should rename it to "z[1-7-10]_Lucky_Block_v5-1-0.jar".
• This is to get the luck crafting to work with Tinker's Construct metals.

• Copy the contents of the download zip into your .minecraft folder or whatever directory you have your mods, config, saves, etc. folders in.

• If it asks you to overwrite files, say Yes.
  • Note that if you already had Loot++ and had entries in the config files for it, this WILL overwrite those, so you may want to combine the Loot++ config files manually.

• Run the game

• Go to the resource packs and enable the Spiral Lucky Block resource pack.

• Load up a world and get lucky!