Where am I? and why this place looks so weird!!?

Rise Up Survival is a map where you must survive and go as high as you can!!!

Islands:

• Island 1
• Island 2
• Island 3
• Island 4
• Island 5
• Island 6
• Island 7
• Island 8
• Island 9
• Island 10
• Island 11
• Island 12
• Island 13
• Island 14
• Island 15
• Island 16
• Island 17
• Island 18
• Island 19-Island 19.5
• Island 20-Island 20.5