Eye of the Needle, Natural arch near Fort Benton, Montana, US
The Eye of the Needle formation stood 11 feet tall along the Missouri River, featuring two sandstone pillars connected by an arch at the top.
Meriwether Lewis documented the arch during the 1805 Lewis and Clark Expedition while navigating the upper Missouri River through Montana territory.
The formation remained a reference point for river navigation and outdoor activities until its collapse in 1997, leaving only two six-foot pillars.
The remnants of the arch are accessible by boat, located 55 river miles east of Fort Benton, near the Eagle Creek Campground.
Natural forces shaped this sandstone formation over thousands of years until geological processes led to its eventual collapse in May 1997.
Location: Montana
GPS coordinates: 47.91110,-110.06200
Latest update: April 19, 2025 12:57
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