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No. 7 Stonehenge, UK
Stonehenge is worth €10.538 billion ($13.232 billion).Reuters
Nazca Lines
The Nazca Lines are the most outstanding group of geoglyphs in the world. Etched in the surface of the Peruvian desert, patterns outlining about 300 hundred figures, animals and birds, made of straight lines and geometric shapes... are visible only from the air! The massive-scaled geoglyphs also include stylized human-like forms. The fact that the lines, believed by some to be as old as 200BC, can only truly be appreciated from the air, has left generations mystified, as to how these could actually have been constructed and... just what they were meant for!Reuters
Easter Island
The iconic Easter Island statues may not be the only mysteries on Rapa Nui - bacteria found in soil on the Polynesian territory may hold the key to curing Alzheimer's disease, according to researchers at the University of Texas San Antonio Health Science Center.Reuters
Mayan Pyramids
Deep within the jungles of Mexico and Guatemala and extending into the limestone shelf of the Yucatan peninsula lie mysterious temples and Mayan pyramids. The Mayan civilization was one of the most baffling ancient civilizations of all time. Until now, no one is certain who the Mayan were, how they lived and the reason behind the sudden collapse of their civilization.Reuters
Demon City of Xinjiang, China
The city of Xinjiang (Mogui Cheng) is also called the Wuerhe Windy City. Why? Well... about 100 kilometers to Karamay, the Demon City, as it is also called, is in the Wuerhe mining site, in the lower reaches of the Jiamu River. In the outlying Gobi Desert, there are numerous unexplained criss-crossing earthen mounds in different heights, like ancient castles. It is said that screaming and shouting sounds can be heard at night when the wind passes through them. Indded, sometimes even the cries of monsters and wolves can be heard.About Xinjiang site
Machu Picchu In Cuzco, Peru
Has Machu Picchu, the "Lost City of the Incas," become a victim of its own success?Reuters

The world is full of the most mysterious and secret places. These are locations all around the world that we either don't know anything or about or, quite simply, are afraid to venture any further!

There are so many unexplained phenomena... who built some buildings... who created those statues... why do planes and ships disappear here... why do radios not work in some places... the list goes on and on.

In addition, there has often been so much uncertainty about these places. It is understandable, of course. After all, who is really brave enough to fly into the Bermuda Triangle just on a dare?

As we said, there are several such places all around the world and we couldn't possibly write about them all.

Nevertheless, click on "Slideshow" above, check out the following most mysterious places in the world... and tell us what you think...