This is a giant creative mode world that my cousin Kyle and I have been working on for a little over a year. We've used minimal terraforming/external programs and is built in the regular minecraft scale (1m per square block). While the architecture varies greatly, we generally build in ancient to industrial era styles. While there are a few buildings that could be desribed as almost futuristic, we avoid building anything in contemporary styles.

There are multiple countries with cities and villages inside them, and an extensive transportation system. 

Right now the countries are as follows:

Mordor: A small but extremely developed area with 3 established cities. This is the most "complete" region on the map. Named after Mordor from Lord of the Rings.

Goerden: South of Mordor and much larger - has two very incomplete cities right now.

Corsina: Southeast of Goerden and very sparsely built so far. This country is huge and is meant to be sort of a parallel to ancient Rome. Has two cities.

Kraegoma: Large and futuristic, this is primarily the work of my cousin. It is northwest of Mordor. Has one city and a generated village.

Palkios: Very large and mostly desert, it is northwest of Kraegoma and based loosely off of India. Has four cities, two of which are generated villages.

This is a continuous project that will technically never be finished - only parts of it will when there is no more room to build in the area. I will be uploading more screenshots and eventually the world itself.
I will also be using my tumblr as a journal and screenshot dump for the project at http://phylanusv.tumblr.com/