- White Bear Lake (Minnesota) (Wikipedia)
White Bear Lake (Dakota: Bde Maṭo Ská ) is a lake in northeastern Ramsey County and western Washington County in the U.S. state of Minnesota, in the northeast part of the Minneapolis-St. Paul metropolitan area. The city of White Bear Lake takes its name from the lake.
- 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.