7Thor’s Well, USA
On the Oregon Coast edge, a huge gaping sinkhole exists that never fills up even though it is situated in the middle of the sea. Also known as ‘drainpipe of the Pacific’ and ‘the gate to the hell’, Thor’s Well is a bowl-shaped hole made of rough basalt shoreline. This hole appears to drain water from the ocean and during the high tide, no one dares to get any closer to the well. The 20 feet deep hole has been formed due to waves crashing across the same region for years, leading to erosion.
