When I am in unfamiliar locations, it is difficult to know where I should not proceed.
危険地域と安全地域が複雑に入り組んでる
Dangerous and safe areas are intricately complex
危険で安全な地域を定義するのは困難です。
Dangerous and safe areas are hard to define.
危険な地域に入ると不安になります。
I feel uneasy when I enter into a dangerous area.
なじみのない場所にいるとき、
どこに進むべきではないかを知ることは困難です。
When I am in unfamiliar locations,
it is difficult to know where I should not proceed.
Safe and dangerous areas are all mixed together.
Safe neighborhoods and dangerous neighborhoods are intertwined.
The safe areas and dangerous areas blend into each other.
The boundaries between safe and dangerous areas are not clearly defined.
「危険地域と安全地域が複雑に入り組んでいる」は、英語では
mixed together
intertwined
blend into each other
not clearly defined
などを使って表現できます。
アメリカ合衆国 
