- Sasquatch! Music Festival was an annual music festival held at The Gorge Amphitheatre in George, Washington, United States. It took place on Memorial Day weekend, running for three to four days. In 2018, it was announced that the festival was canceled indefinitely and would not return in 2019.
- Hollow Earth (Wikipedia)
The Hollow Earth is an obsolete concept proposing that the planet Earth is entirely hollow or contains a substantial interior space. Notably suggested by Edmond Halley in the late 17th century, the notion was disproven, first tentatively by Pierre Bouguer in 1740, then definitively by Charles Hutton in his Schiehallion experiment around 1774.