Deep Earth (Continent)

Deep Earth is an extensive set of interconnected caverns that are massive in size. These caverns and the unique flora and fauna they contain form their own ecosystem.

There are seven giant caverns, each as large, or larger, than a nation on the surface. Each cavern is connected to the others at multiple points. 

Each cavern in home to a kingdom or empire of sentient creatures. Many of these are built on the bones of previous kingdoms that are buried in the rubble. 

Entry Points:

1. Australia via rock caves in Uluru. Leads to #1.
2. China via tombs beneath the Forbidden City leading to Diyu, the largest cavern and the closest to the surface (approximately 40 miles). Leads to #2, Diyu.
3. North pole via an unmapped island covered in ruins. Leads to #3. 
4. Grecian Temple on the island TBD. The temple, when properly activated, allows cross teleportation to #4, Amazon Kingdom
5. Iceland from the caldera of the Reykjanes Volcano. Leads to Cavern #5. A geothermal powered elevator ascends/descends to Midgard's Heart in approximately 12 Hours at a speed of over 60 miles/hour - 750 miles deep.
6. Chotian mounds on the eastern side of the Mississippi River. Leads to Cavern #6.
7. Sudan along the Nile. This is an artificial entry point created when Venusians expanded and extended natural tunnels into the Deep Earth. this leads to #7, Deep Egypt (approximately 75 miles). 

Caverns

1. Size of France (287K Sq miles) - Goblinoid kingdom
2. Size of Niger (1.3M Sq miles) - Chinese "Diyu" Humanoid kingdom
3. Size of Japan (378K Sq miles) - 
4. Size of Greece (132K Sq miles) - Amazon Kingdom
5. Size of Ukraine (603K Sq miles) - "Midgard's Heart" Humanoid kingdom
6. Size of Madagascar (587K Sq miles) - 
7. Size of Egypt (1.0M Sq miles) - "Deep Egypt" Humanoid kingdom