Many places on Earth remain a mystery. Deep oceans, dense forests, and hidden caves hold secrets. Scientists and explorers continue to search for answers.

1. The Mariana Trench

The Mariana Trench is the deepest part of the ocean. It reaches nearly 11,000 meters below sea level. Few have explored its depths. Strange creatures live in the darkness, and much remains unknown.

2. The Amazon Rainforest

The Amazon is the largest rainforest in the world. Thick trees and remote areas make exploration difficult. Many species and ancient ruins remain undiscovered. Scientists believe new plants and animals still exist there.

3. Antarctica鈥檚 Subglacial Lakes

Antarctica has lakes hidden beneath thick ice. Some of these lakes have been untouched for millions of years. Scientists study them to learn about life in extreme conditions.

4. The Son Doong Cave

Son Doong Cave in Vietnam is one of the largest caves on Earth. It has its own river and jungle inside. Parts of the cave remain unexplored due to its size and depth.

5. The Deepest Parts of the Ocean

Oceans cover most of the planet. Many areas remain unseen by humans. New species and underwater landscapes continue to be discovered. Scientists believe the ocean hides many secrets.

6. The Greenland Ice Sheet

Greenland is covered by a massive ice sheet. Beneath the ice, scientists believe there are mountains, valleys, and lakes. The thick ice makes exploration difficult.