1) The construction of the Great Wall of China began in the 7th century BC and was completed over several centuries, spanning thousands of miles.

2) The concept of reinsurance, which is insurance for insurance companies, originated in the 17th century.

3) The Eiffel Tower can be 15 cm taller during the summer due to thermal expansion.

4) The Maldives, located in the Indian Ocean, is an archipelago consisting of 26 atolls. It is renowned for its pristine white sandy beaches, crystal-clear turquoise waters, and vibrant coral reefs, making it a popular destination for honeymooners and scuba diving enthusiasts.