I think the Mariana Trench is one of the most fascinating places on earth.
The Chinese submersible Fendouzhe just reached one of the deepest spots on the planet, reaching a dizzying (and dark) depth of 35,791 feet (10,909 meters), according to a state-run news agency.
A still from a video shows the submersible returning to port and its pilots disembarking after the weeks-long expedition. (Image: © Screenshot/Xinhua News Agency)