An acoustic anomaly with a mysterious cause.

An outsider art studio that created a piece of work so popular they had to turn mainstream.

A mid-century telephone booth still stands, now a long-distance relic of the past.

The granite monument is engraved with the image of the talking horse's head coming through a barn door.

Learn all about this iconic air rifle without putting an eye out.

Where one of America's greatest songwriters lived before he was Bob Dylan.

An abandoned bus station transformed into a museum dedicated to the history of Greyhound Lines, in the place where it all began.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

This natural marble cave is one of only five national monuments in Oregon.

The only surviving piece of a submarine said to be the most decorated vessel in U.S. history.

Cascading outward, this waterfall creates the appearance of a flowing veil.

A hiking area billed as a possible home to Bigfoot.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

Every four years, millions of salmon fill a river so densely that its waters appear deep crimson.

Thousand-year-old trees tower within one of the world's only inland temperate rainforests.

A suburban street in Anchorage doubles as a runway, and each home has its own airplane hangar.

The beginning of the historic Iditarod Trail connecting the Alaskan cities of Seward and Nome.

This museum in a shuttered train station remembers the island's forgotten rail system.

Gorgeous cave resemble a winter wonderland.

An auroral research program that superheats the ionosphere.

This popular fishing spot at the outflow of a 4.5-mile long hydroelectric tunnel sports a jetty literally made out of classic cars.

The only house built with a turret, crenellations, and a moat in Palmer, Alaska.

An Alaska livestock farm devotes itself to harvesting wool from creatures that once ran with mammoths and sabertooth tigers.

Colorful boxes placed over the dead are left to rot and crumble.