Bathyscaphe Trieste
Trieste is a Swiss-designed, Italian-built deep-diving research bathyscaphe, which with its crew of two reached a record maximum depth of about , in the deepest known part of the Earth's oceans, the Challenger Deep, in the Mariana Trench near Guam in the Pacific. On 23 January 1960, Jacques Piccard (son of the boat's designer Auguste Piccard) and US Navy Lieutenant Don Walsh achieved the goal of Project Nekton.
Neffs Cave
In 1952 the Salt Lake Grotto of the National Speleological Society was established, and several weeks later the grotto's members obtained permission from the National Forest Service to explore the cave. They spent nearly eleven hours in the cave but had not reached the end of the main passage before they had to turn back. Teams from the grotto returned in 1953 and 1956, and in the last visit they succeeded in reaching the bottom of the main passage. They calculated a vertical depth of 1186 feet (361 meters), which was later revised to the present figure of 1163 feet (354 meters). Neffs Cave is the 13th deepest cave discovered in the United States.