What the Hopi Said About the Sealed Passage Beneath the Grand Canyon — Recorded in 1909

The Shipwreck in Lake Superior That May Explain Where America's Lost Copper Went

The Ohio River Fell in 1930, Exposing Cut Stone Steps — The Army Dynamited the Bank Within a Week

The Missouri Dropped in 1934, Revealing a Stone Causeway—The Corps of Engineers Buried It Under Fill

The 1929 Drought Emptied a Georgia Millpond — A Row of Fitted Stone Steps Descended Into the Silt

What the Blackfoot Said About the Men of Stone Along the Missouri — Recorded in 1856

A Plow Turned Up a Bronze Hinge in an Illinois Field in 1874—The Land Has Been Fenced Off Ever Since

The Tunnel Under Galveston Nobody Remembers Digging — City Crews Bricked It Shut in 1901

What the Shawnee Said About the Fires Burning Inside the Kentucky Caves — Documented in 1811

The 1906 Quake Split a Sonoma Hillside — Inside Was a Fitted Stone Arch No Mission Ever Built

What the Seminole Warned Was Sleeping Beneath the Everglades — Recorded in 1901

The Alabama Cotton Field Sinkhole That Opened Into a Room With No Entrance

The Desert Well Diggers Hit a Copper Door in 1902 — No One Ever Opened It Again

What the Cherokee Said Was Sealed Beneath Blood Mountain — Recorded in the 1870s

The Michigan Sinkhole That Swallowed a Barn — What Was Underneath Wasn't Rock

What the Cree Said Was Hidden Beneath Lake Superior — Recorded in the 1870s

The Texas Well Crew Struck a Bronze Door at 80 Feet — The County Sealed the Site by Winter

Every Cave Along the Cumberland Plateau Ends at the Same Smooth Wall — The Survey Was Never Finished

What the Navajo Said About the Sealed Door in the Carrizo Mountains — Recorded in 1893

What the Seneca Said About the Little People Who Mined the Hills — Recorded in 1838

Missouri River Dropped in 1931, Baring Stone Piers—Corps Blasted Channel Deeper

The 1935 Dust Storm Peeled Back a Kansas Prairie — A Sunken Ring of Standing Stones Faced Due North

What the Cherokee Said About the Miners Who Came Before the Europeans — Documented in 1876

The Colorado River Dropped in 1934, Exposing a Stone Road — The Survey Team Was Reassigned in a Week

What the Navajo Said Was Sealed Beneath Monument Valley — Recorded in the 1880s

The 1927 Flood Drained a Missouri Quarry — What the Mud Uncovered Had Never Weathered

What the Chumash Said About the City That Sank Into the Pacific — Documented in the 1890s

What They Pulled From the Comstock Lode Shaft in 1879 — The Assayer Never Filed His Report

The Georgia Well Digger Who Hit a Bronze Floor at 60 Feet — Neighbors Told Him to Stop Digging

A Vermont Farmer's Plow Hit a Stone Floor in 1891 — It Was Still Warm a Hundred Feet Down

The 1937 Flood Tore Open a Kentucky Bluff — Inside Was a Braced Corridor Nobody Had Timbered

What the Zuni Said About the World Before the Flood — Recorded in the 1880s

The Oklahoma Town Built Over a Buried Pavement — It Runs 14 Miles and No Deed Ever Claimed It

The Loggers Who Walked Into a Vault Under the Cascades in 1928 — What They Saw Before the Collapse

The 1936 Heat Wave Dried an Arkansas Oxbow — A Plank Road Ran Into the Bank and Kept Going

The 1933 Drawdown Emptied a Tennessee Channel—Stone Doorframes Stood in the Mud, All Facing Upstream

The Ohio River Fell in 1930, Exposing a Stone Causeway — The Corps Dynamited It Within a Week

The Drowned Harbor That May Explain America's Lost Copper Mystery

What the Paiute Said About the City Under Death Valley — Recorded in 1904

The Ancient Miners Who Vanished From the Great Lakes

What the Blackfoot Knew About the Falls at Niagara

What the Nez Perce Said Was Sealed Beneath Glacier Country

Who Really Built the Serpent Mound and Why It Was Hidden

The Copper Road That Ran Through the Rocky Mountains

What the Powhatan Knew About the Wreck in Chesapeake Bay

What the Comanche Said Was Hidden in the Badlands?

Who Really Carved the Tunnels Under Mount Rushmore?

What the Crow Knew About the Caves Beneath the Rockies?

What the Shoshone Said Was Buried Under Yellowstone?

Oddly Moments Caught on Camera