It’s true, human are born explorer and adventurer. As a human, we have this “desire” to explore new places and to go beyond.

We already climbed the highest mountain, explored the vastness of the Antarctica and the emptiness of the Sahara’s wasteland. We have also reached the outer space, step on our neighbor moon and even explored the vastness of our universe.

It no doubts, there’s no ending for man’s voracious appetite to explore his surroundings and the unknown. However, there still some places on Earth that have not yet reached or fully explored by man.

And these places are some of the most isolated and mysterious places on this planet.

Here a short list of the most unknown and mysterious places on Earth. Check out the list and try to include them on your travel list.

Mount Bosavi, Papua New Guinea

Located in the Southern Highland province of the Papua New Guinea, the Mount Bosavi is actually a collapsed cone of an extinct volcano on the Great Papuan Plateau. The cataclysmic event, which occurred around 200,000 years ago, has resulted into a huge crater with a deep of over 1 km.

The mysterious volcano is said to be included in the Sulamesi Wildlife Management Area, and its part of the proposed UNESCO World Heritage Site, which also includes the Great Papuan Plateau and Kikori River.

A 2009 BBC wildlife documentary showed the richness of fauna and flora in the old crater. The old volcano was reportedly home to a number of endemic species. Unfortunately, going to the old volcano can be tough and brutal. The trail is so dangerous that is only advisable for experienced mountain climbers and hikers.

Mariana Trench, Pacific Ocean

Located in the western part of the Pacific Ocean, the Mariana Trench is the deepest part of the world’s oceans and its one place on this planet that hasn’t yet fully explored by man.

The trench measures around 1,580 miles long and 43 miles wide on average, and reaches a scary depth of over 10,994 meters at a small part of the Mariana Trench, which known as the Challenger Deep.

For comparison, the highest point on the planet today is Mount Everest, which reaches about 8848 meters above sea level. So if Mount Everest were dropped into the Mariana Trench, its peak would still be over 1mile submerged.

The Mariana Trench was considered as one of the least explored parts of the world due to its extreme depth. At this extreme depth, the water pressure could be very dangerous. According to experts, the water column at this depth can exert a pressure of around 15,750 psi, which more than 1000 times more powerful than the standard atmospheric pressure at sea level. Despite its extreme depth, life still strives at this part of the ocean. Previous expeditions revealed a number of organisms and sea creatures, living in the deep sea.

Gangkhar Puensum, Bhutan

The mysterious Gangkhar Puensum is the highest mountain in Bhutan and it holds the record as the highest unclimbed mountain in the world. Not much information is known about this mountain.

The first recorded measurement of Gnangkhar Puensum was made in 1922. But until recent years, the maps of the mountain were still not accurate.

And because of the inadequate and poor mapping of the region, many expeditions made have experienced some troubles finding the summit. However, in 1998, an expeditionary team have managed to scale a peak of the mysterious mountain.

Vale do Javari, Brazil

Looking for new forest adventure or rich flora? Check out Brazil's Vale do Javari, one of the most isolated places on Earth and also one of the hardest places to reach.

According to the National Geographic Society, the place is home to the largest concentration of uncontacted tribes in the entire world.

With an area of about 85,444.82 km, Vale do Javari is one of the largest indigenous territories in Brazil. The sprawling rainforest was named after the vast Javari River, which is the most important river system in the region.

Getting to the region is highly prohibited by the Brazilian law. The Vale do Javari is especially well protected from outsiders or explorers. The vast forest reserve is overseen by the well-organized Javari Valley Ethno-Environment Protection Front, which operates three control posts along major rivers leading to the depths of the forest reserve. The main goal of the Javari Valley organization is to maintain the rich repository of biodiversity and protect the forest from exploitation.

This remote place has been described by some experts as one of the most isolated places on the planet due to the thick vegetations and extreme geographic location. Despite of its isolation, the tropical rainforest is home to a great number of indigenous people or Indian tribes. Those tribes, which believed to be as many as 200-3300 people, were initially discovered through satellite images of the vast rainforest.

The existence of the place was also confirmed by aerial reconnaissance flights. The aerial flights also discovered that the isolated Indians have grown corns, banana, and cassava. In 2002, the National Geographic launched a three-month expedition through the region’s primeval forest to track a mysterious indigenous tribe known only as Flecheiros or the Arrow People.

Machapuchare, Nepal

They called it the last pristine mountain in the Himalayas. The Machapuchare, which means "fishtail," is actually a lone mountain in the Annapurna Himalayas region, just north of central Nepal. The mysterious mountain has been described by the local Nepalese population as sacred to the god Shiva, which the main reason why it’s off limit to climbing.

Due to the difficult terrain and harsh weather condition, the Machapuchare has never been climbed to its summit. The only recorded attempt was made by a British team in 1957. Led by Lt.Col. Jimmy Roberts, the British team have managed to reach within 150 meters of the summit via the north ridge, to an estimated altitude of about 6,947 meters.

However, the team has never completed their mission, as they had promised not to set foot on the mountain’s summit. Since then, the Machapuchare has been declared sacred and forbidden place. It’s now closed and off limit to mountaineers.

Tsingy de Bermaraha

Situated near the western coast of Madagascar, the Tsingy de Bermaraha has been declared as a nature reserve. In 1990, the place was listed as UNESCO World Heritage Site to protect its unique geography and preserve the mangrove forests. The place is also home to huge numbers of animals and even new species.

Some of the biggest attractions in this protected reserve are the incredibly needle-shaped limestone formations. However, those limestone formations poised great dangers to explorers.

In fact, the word “Tsingy” derived from a local word, which means “the place where one cannot walk barefoot.” The limestone formations are terribly sharp and can easily cut through flesh with lethal accuracy, which makes navigating extremely hard and dangerous. Access to this nature reserve is limited. Tourist can access the remote place either by road or chartered plane.