As part of the original design, the names of 72 French scientists and other famous people is imprinted on the sides of the Eiffel tower

On the Eiffel Tower, seventy-two names of French scientists, engineers, and mathematicians are engraved in recognition of their contributions. Eiffel chose this “invocation of science” because of his concern over the protests against the tower. The engravings are found on the sides of the tower under the first balcony. The engraving was painted over at the beginning of the twentieth century and restored in 1986–1987 by Société Nouvelle d’exploitation de la Tour Eiffel, a company contracted to operate business related to the Tower. The Tower is owned by the city of Paris. The letters were originally painted in gold and are about 60 cm high. The repainting of 2010/2011 restored the letters to their original gold colour.

The list is split in four parts (for each side of the tower). The sides have been named after the parts of Paris that each side faces.

The material to build the Taj Mahal was brought in from various parts of India by a fleet of 1000 elephants

Rice flour was used to strengthen some of the bricks that make up the Great Wall of China

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The Skinny House in the North End of Boston, Massachusetts is an extremely narrow four-story spite house reported by The Boston Globe as having the "uncontested distinction of being the narrowest house in Boston".

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The Eiffel Tower has been the inspiration for the creation of over 30 duplicates and similar towers around the world.

The Eiffel Tower was the inspiration for the Blackpool Tower in Blackpool, England. After visiting the Great Paris Exhibition in 1889, the town's mayor John Bickerstaffe commissioned the building of the tower, which has a very similar design and was completed 1894. The main differences are that the Blackpool Tower is approximately half the height of the Eiffel Tower and is not freestanding, the base being contained within buildings which house the Tower Circus. Both the Eiffel Tower and Blackpool Tower feature on the list of the World Federation of Great Towers.

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In architecture, a folly is a building constructed primarily for decoration, but either suggesting by its appearance some other purpose, or merely so extravagant that it transcends the normal range of garden ornaments or other class of building to which it belongs.

In the original use of the word, these buildings had no other use, but from the 19th to 20th centuries the term was also applied to highly decorative buildings which had secondary practical functions such as housing, sheltering or business use.

18th century English gardens and French landscape gardening often featured Roman temples, which symbolized classical virtues or ideals. Other 18th century garden follies represented Chinese temples, Egyptian pyramids, ruined abbeys, or Tatar tents, to represent different continents or historical eras. Sometimes they represented rustic villages, mills and cottages, to symbolize rural virtues. Many follies, particularly during famine, such as the Irish potato famine, were built as a form of poor relief, to provide employment for peasants and unemployed artisans.

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Approximately 25,000 workers died during the building of the Panama Canal

Approximately 20,000 of them contracted malaria and yellow fever

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Construction on the Leaning Tower of Pisa began on August 9th, 1173

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On 2013, the largest shopping mall in the world is the New South China Mall located in Dongguan, in China

This huge Mall is 892 Km2, (9,600,000 sq ft) It has enough space for 2.350 storesm but funny enough, on 2013, 99% of them are still vacant! Fancy getting one of them?

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In 1893, the first mosque in the United States was built

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The highest bridge in the world is located in the Himalyan mountains. It was built by the Indian Army, in 1982, and is about 5,600 metres above sea level

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The first subway system in America was built in Boston, Massachusetts in 1897

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The Sears Tower consists of nine framed tubes, which connects nine skyscrapers as one building

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What colour were originally the Great Pyramids?

The Great Pyramids used to be as white as snow because they were encased in a bright limestone that has worn off over the years.

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The reason firehouses have circular stairways is from the days of yore when the engines were pulled by horses. The horses were stabled on the ground floor and figured out how to walk up straight staircases.

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The Pentagon, in Arlington, Virginia, has twice as many bathrooms as is necessary. When it was built in the 1940s, the state of Virginia still had segregation laws requiring separate toilet facilities for blacks and whites.

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The Main Library at Indiana University sinks over an inch every year because when it was built, engineers failed to take into account the weight of all the books that would occupy the building.

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The Boston University Bridge (on Commonwealth Avenue, Boston, Massachusetts) is the only place in the world where a boat can sail under a train driving under a car driving under an airplane.

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Over 1000 birds a year die from smashing into windows.

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