ZiggyBase

Ziggy Town was a base built sometime in 2012. The base was founded after Ziggy was going to repair NFE but, instead of going to the coords in the Overworld, he went to those coords in the Nether. The base is best known for its giant bedrock comet. Not so far away from the base is a big part of dried up ocean, walled off from the water with bedrock. The so called "Bedrock Dam". Builders got the bedrock through popbob's backdoor which allowed to select players to teleport to, fly and use Not Enough Items mod to spawn stuff in. One of the members who got these perks made stashes out in the millions filled with illegal items, including bedrock. It was one of many bases that had the signature "town" in its name, as bases back then were generally called towns. The base was eventually griefed by an unknown player back in 2012, possibly Acid1212. Region files of the town can be downloaded here (superflat world).

Architecture
The base is comprised of standard Minecraft castles and houses. It was more colorful than Passie Town due to the fact that the base was built in a different Minecraft update, which introduced new creative blocks that players could use.

Bedrock Comet
The famous bedrock comet is one of the last bedrock builds that is still standing, as Hausemaster has removed several illegal builds and lag machines over the years. The build was actually not a comet, but it is based off of a beacon from the Dead Space franchise. A wither was spawned inside the comet presumably in 2012 and was killed later in 2016 by The 4th Reich.

Attempts to grief
In 2017, the top 30 layers of the bedrock comet were removed by househousehouse1 using the dragon egg bedrock removal method. Due to dragon eggs falling through bedrock and breaking multiple pieces at once, there are also a lot of holes in the bottom of the comet.

Bedrock Bunker
An illegally built bedrock bunker near bedrock level is close to Ziggy Town. FitMC made a video on it.

The bunker was 4 blocks wide, 3 blocks tall, and 7 blocks across (on the inside) with no way inside. When using freecam, it was possible to place blocks inside the bunker. Xcc2 said that using freecam, they used the bunker to store items as an ungriefable chest.