An ode to the friendship between four Pacific Rim countries.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

These century-old beehive-shaped kilns were built to produce charcoal for nearby mines.

A collection of 16,000 antlers crammed beautifully into a small shed.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

Legend says train robbers stashed their gold within the depths of this unusual cave.

The highest point in Nevada had to be decided by court order after California tried to claim it as their own.

WWII-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers. .

At this deceptively beautiful beach, nothing is what it seems.

"Where the ducks walk on fish."

An auroral research program that superheats the ionosphere.

This seemingly unremarkable boulder is said to bear the hoofprint of the devil himself.

This ancient Hawaiian henge may have been an early star chart.

One of the largest Native American shell middens stands 30 feet tall.

This former mining hub holds a surprising abundance of undisturbed relics from the Old West.

The largest tidal whirlpool in the Western Hemisphere.

Two massive and unstable sinkholes are yearning to unite, and their consummation could be catastrophic.

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

A rare kind of blue bear can be found chiefly in the national park that shares their name.

This small road tunnel is the only place where you can cross beneath the Erie Canal.

A wild trout fishery in Arkansas.

This dilapidated ship carcass covered in trees is a striking sight.

The world-record holder for the longest bridge stretching continuously over water.

Population: 1.