Top 10 Most Mysterious Landmarks in the World

This is an underwater rock formation in Japan, consisting of several platforms and pillars. There is also a triangular formation some call the "turtle." Not much else is known about this monument, especially considering it has managed to survive such rough waters. There's a lot pointing to how it could be man-made, while there is also evidence that it could be a natural formation. The question still remains: what purpose does it serve?

It's very interesting. It's weird that somebody would go to the trouble of creating something like that underwater. Maybe it was once above water and people made it before the water rose.

These are very large geoglyphs formed in the soil of the Nazca Desert. Some are said to be drawings of several different wild species, such as a monkey, llama, and lizard. Said to have been created hundreds of years ago, these drawings have remained untouched for so long. The purpose and origins of these lines remain questioned, with some even theorizing that aliens made them, considering some of the animals in question weren't native to Peru.

These monuments are thousands of years old and are said to have taken over a millennium to complete. Although it's agreed that Stonehenge was a burial ground, what remains unknown is how prehistoric humans could have erected such large stones. What's even more confusing is the inner ring, which is made of bluestone that can only be found hundreds of miles away from its location. The origins are even more questionable, with many stories spanning over centuries having been told.

Legendary. A lot of people say it was built by the Picts or even the Romans. I don't know if I buy that, though.

This ancient monument goes by various spellings of the name, but regardless of which one you choose, the collection of walls outside of Cuzco has much to be questioned about. It's said that the Incas were masters of rock structures, and the fact they could lug heavy stones into perfectly fitting places is astounding. Several walls can be found, and it's said they were used for defense as a barrier. Another theory states the walls were for symbolic purposes native to the Incas.

Sacsayhuamán is a complex of walls built with large blocks of rock, speculated to have been used as some sort of barrier. The materials used include rock and limestone, with each block weighing no less than 120 tons. However, some of the largest blocks are estimated to weigh anywhere from 200 to 320 tons. Scientists are baffled by how these blocks were transported in the first place, along with the construction of the walls themselves. It is still a mystery to this day how these blocks were moved and used to create such a wall.

Newgrange is a tomb said to have been built thousands of years ago. Inside are stone basins with cremated remains, and outside is a sturdy design that's completely waterproof. Something interesting to note is that the design of the tomb allows for a light passage on the winter solstice, a feat which baffles many who've studied it. Who was it for and why was it so important? We'll never know.

This monument is actually the youngest on the list, being built around 1980, and it still holds great mystery behind its purpose and origins. A man under the pseudonym R.C. Christian commissioned the construction, although nothing else about the man or his organization is known. The stones are inscribed in different languages and offer "guides" to world peace. For all its strangeness, some have theorized that the Guidestones were a response to the ongoing Cold War, guiding the way to a new world under the threat of a nuclear holocaust.

The Moai are a series of human statues constructed between 1250 and 1500 AD, believed to depict important ancestors of the Rapa Nui people. They were carved from volcanic rock, and hundreds were destroyed during conflict. These statues weigh several tons, so how they were carved and transported is still a mystery.

Made of earth, gravel, and wood, the Goseck Circle is said to be a prehistoric solar observatory. It consists of several circular ditches and three openings pointing in different directions. The circle's true purpose is still up for debate. Whether a solar observatory, a sacrificial ground, or another place of ritual, this circle will always be a mystery.

Sphinxes are massive stone statues embodying lions with human heads. The most prominent is found in Egypt and is said to have been a symbolic guardian to the ancient Egyptians. It is near the pharaoh Khafre's pyramid, which may suggest it is thousands of years old. However, evidence of water erosion suggests it may be even older. Not much else points to the who, when, why, and how of it all.

We don't know how it was built. Some people say it was aliens, but we don't know for sure. Also, in ancient times, it seemed almost impossible to build giant sculptures like this.