A circle of stones up to 30 feet (9 meters) high and weighing 25 tons in average.

Two concentric rings set in Wiltshire, England.

Building began around 3100 B.C. and continued in phases up until about 1600 B.C.

What's the mystery?

How or why it was built.

What are the theories about it?

Glaciars-water to transport rocks from distant places.

Spiritual ceremonies, cementery, solar calendar, pagan celebrations, concert hall, cathedral, Merlin, UFOs..

What fascinates you about it?

I was there and it's impressive, really big stones placed keeping an exact order. Besides, I feel particularly interested in history and ancient civilizations.

high

An ancient Incan city built in the 15th century, located high in the Andes mountains of Peru.

What's the mystery?

Why was it built in such a far and difficult place to get to? How did the Incas build such perfectly cut stone walls without using mortar, with stones that fit together so firmly they have survived earthquakes?

What are the theories about it?

Possibly a royal estate, religious site, or astronomical observatory. Some suggest it was an agricultural experimentation center or a place of retreat for the Incan emperor.

What fascinates you about it?

I am fascinated by Machu Picchu because of his architecture and the way the Incas were able to build perfect stone structures without modern tools. The location is also breathtaking, and it’s amazing how the site was hidden for so long until it was discovered in the early 20th century.

Nazca lines are a group of hundreds of geoglyphs in the Nazca plateau, on the southern coast of Peru. Were drawing between 2nd century B.C. and 8th century A.D.

What’s the mistery?

The lines were drawn by removing small dark stones from the surface, so that the light sand underneath could be seen. But, what was the purpose of this drawings?

What are the theories about?

Some studies point to a big calendar. Other say they were roads. Some people even believe they were drawn by extraterrestial beings. But the more widespread hypothesis is that the Nazcas drew them for ceremonial purposes. They lived from the agriculture in the middle of the desert and water was important to them. Some kind of ceremonial would be essencial for their culture.

What fascinates you about it?

I wonder how those people reallly were able to draw that huge drawings in the desert. And, overall, why did they spend this effort to draw them?

The Fountain of the Fallen Angel is located in the well-known Retiro Park in Madrid. It was built in 1877 by the Madrid sculptor Ricardo Bellver.

What's the mystery?

This monument represents the expulsion of Lucifer from Heaven and its history is is related to the afterlife.

What are the theories about it?

The fountain is placed in a roundabout with 5 streets that form a pentangon known as the 'Morning Star' or an inverted pentagram (The Star of Tomorrow) which symbolizes Lucifer and curiously, that location is 666 meters above sea level. This number is of great interest to lovers of esotericism for being known as 'the number of the Beast'.

It also said that Retiro Park is a possible door to Hell intentionally.

What fascinantes you about it?

The Fountain of the Fallen Angel is a monument that has always caught my attention. For me it symbolizes rebellion, disobedience but at the same time it also symbolizes beauty and wisdom.

They are face statues located in the Easter Island, part of Chile, formed between the 13th and 16th centuries by Rapa Nui people.

What is the mystery?

How and why they were created.

What are the theories about it?

They were transported by ropes and manpower or rolled on logs with extensive deforestation.

Spiritual symbols of ancestors, believed to protection from natural elements and prosperity to the community

What fascinates me about it?

My history teacher traveled to Easter Island to see the statues and started to tell storys about them, since then I love this mystery and I wonder how they were made in those days.

What? Where? When?

Crop circles are circular designs of lying or burnt grass that appear in crop fields, usually of cereals. Most of them have appeared since the late 1970s, in fields in England.

What´s the mistery?

Fans and believers in paranormal phenomena attribute them to the intervention of extraterrestrial beings, specifically to UFO activity.

They describe the malfunctioning of some electrical devices, battery discharges, etc. They also point out the complexity of the geometric design or the supposedly unknown technology with which the circles are made.

What are the theories about it?

There is no evidence to confirm this last belief, and some that have been investigated have been shown to be the product of man's hand. Although farmers have expressed concern about the damage to their crops, interest in crop circles has led to bus and helicopter tours of the fields where they are found, as well as walking tours, T-shirt sales and book sales.

What fascinates you about it?

I am fascinated by these enormous circles, they seem like authentic works of art and I think they are an extra source of income for the area, as well as having a touch of mystery.

What is the mistery?

The Desert bedouins say that misterious eye , it is the footprint of an alien landing.

What is the theory about?

Geologists say the marks was caused by the impact of a huge meteorite. However,futher studies into the sedimentary rock have shown formed millions years ago. Age fom proterozoic.

What fascinates you about it?

Unfortunately I have not been locky enough to visit the place , but I must say that one of the most important characteristics of this structure is the way it changes its apppearence acording to the angle of vition so ,that's I find fascinanting about this mistery.

by Magdalena Castro,

Loch Ness monster, large marine creature believed by some people to inhabit Loch Ness, Scotland. The earliest report of a strange water monster appears in an ancient text from the sixth century AD.

What’s the mistery?

This describes an encounter by the Irish monk Saint Columba who was staying in the near the mouth of the River Ness. Columba, upon hearing of a monster, thoughtfully sent one of his companions to test out the river. On seeing the monster, Columba made the sign of the cross and banished the creature to Loch Ness.

What are the theories about it?

The Inverness Courier carried a report of a monster sighted in Loch Ness in August 1933 by a water bailiff. Since this time, numerous sightings have been reported with the first purported photographs of the monster, taken by Hugh Gray in 1933 and by Surgeon,Robert Kenneth Wilson in1934. The mystery of Nessie has continued for decades and will continue to draw tourists to the shores of Loch Ness for years to come.

What fascinates you about it?

The different theories about what kind of creature lives in the lake: eels, elephants, Greenland shark, wels catfish… and it has not yet been found out.

by Yolanda Fernandez

It is an imaginary triangle in the Atlantic ocean that connects Bermudas island with Puerto Rico and Miami.

What’s the mystery?

Why did most of the planes and the ships that get inside of the radius of this triangle disappear there long time ago?

What are the theories about it?

Some of the theories of this mystery are that it could be because of a giant sea monster, like a giant squid; or it could be also for an alien; or for a mysterious third dimension created by an unknown being. In spite of that, there is one explanation that is considered the right one. This explanation defends that the reason of this mystery is the creation of hexagonal clouds that form strong waves and winds.

What fascinates you about it?

The fact that how nature can become so dangerous and can cause so many disappearances on a specific point of earth. 

By Jaime Gómez.