Astronomy was incredibly important to the ancient Maya. In particular, they tracked the movements of planet Venus, the sun, and the moon.
The Maya Used This Observatory to Predict Death and Harvest
El Castillo or the Temple of Kukulcan is 98 feet tall and has 365 steps. What you can't see from the outside is the original, much smaller pyramid that acted as a foundation.
Chichen Itza's Famous Pyramid is Actually Two Pyramids
How did they get those huge blocks to the top of pyramids? There have been many speculations, but the most likely scenario involves intricate ramps.
Ancient Egyptians Used This Method to Build Tall Structures
The Great Pyramid of Giza was the tallest structure on Earth for more than 3,500 years! Workers had to cut and lay more than 200 blocks a day in order to meet their deadline.
How Did Ancient Egyptians Build Pyramids Quickly?
Tourists commonly ask why the Great Wall follows a seemingly random path. The answer is intimidation and military strategy.
Why Isn't the Great Wall of China Built in a Straight Line?
The first Great Wall was built from mud and reeds over 2,000 years ago. As warfare developed, the wall had to be improved and strengthened.
The Original Great Wall of China
Restoration jobs are supposed to help fix a building, but a few hundred iron clamps did the opposite on one of the world's most well known buildings. The marble is now detaching and breaking.
A Restoration Job Actually Made the Parthenon Worse
A complex ramp was used to move the enormous marble blocks up to the Acropolis. Some of the largest blocks weigh over 10 tons.
How Did Ancient Greeks Build the Parthenon?
Cologne Cathedral, Germany's most visited landmark, attracts an average of 20,000 people a day. Construction of the building started in 1248, but was stopped in 1473, leaving it unfinished until work restarted in the 19th century.
The Cologne Cathedral Took Over 600 Years to Build
The Shrine of Three kings inside the church is believed to hold the remains of the Three Wise Men, whose relics were acquired during the conquest of Milan in 1164. It's only one of many stunning features within the cathedral.
Cologne Cathedral Supposedly has the Bones of the Three Wise Men
Open fires were once used to heat the 1,000+ rooms in the Houses of Parliament. Engineers relied on an intense spire chimney to filter out all the smoke.
Westminster Palace's Chimney has an Air Current Faster than Modern AC
When parliament commissioned this clock in 1854, they insisted Big Ben be the biggest, most powerful clock in the world. It takes an hour and a half to wind this massive engineering marvel!
How Does Big Ben Keep Accurate Time?
The elaborate defenses of Egyptian tombs - and how clever thieves got around them.
How Ancient Grave-Robbers Plundered Egypt
Take a virtual tour of the final resting place of the boy king.
King Tut’s Mysterious Tomb
Treasures provide clues about the mysterious rulers of Teotihuacan.
Relics from the Pyramid of the Feathered Serpent
See inside the secret tomb beneath the Pyramid of the Feathered Serpent.
A Teotihuacan Pyramid Hides the Skeletons of Human Sacrifices