1) The world's largest volcano, Mauna Loa in Hawaii, is also one of the most active.

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

3) 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.

4) The first photograph of a black hole was captured in 2019 using a network of telescopes around the world.