There is a lot to explore in this world as there are several mods installed to generate exciting buildings and dungeons to explore. However, the main focus is the DINOSAURS! Read up on the Fossils Archaeology Revival Mod on how to grow a living dinosaur from a fossil.
Another major mod that affects the game-play is Tinker's Construct. This allows you to build a smeltery to double the amount of material you get from ores, create a furnace that can cook several stacks of items at a time using lava and most importantly - a HUGE range of weapons and tools that can be configured however you like and can be repaired easily.
If you're going to build the next Jurassic Park, you want to be able to build quickly and easily and Better Builders Wands allows you to do so. Along with building easily, there are lots of little tweaks and tools to make life easier and resources easy to collect and manage in the Extra Utilities mod (with the power generation features disabled). Storing all of the materials you have been gathered will be easier using the Iron Chests mod that allow you to expand your chest storage capacity. Just to add a bit of fun and the ability to get cool stuff for free, the LootBags mod makes killing monsters even more fun. There is also a useful mod called Warp Book that allows you to use books to jump between different areas easily.