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

2) The Galapagos Islands, located in the Pacific Ocean off the coast of Ecuador, are renowned for their unique and diverse wildlife, including the Galapagos tortoise, marine iguanas, and Darwin's finches. They played a pivotal role in Charles Darwin's theory of evolution.

3) The Triple Crown in horse racing consists of three prestigious races: the Kentucky Derby, the Preakness Stakes, and the Belmont Stakes.

4) The blue whale is the largest animal to have ever existed, with an average length of about 82 feet (25 meters).