One of the most accessible undersea plane wrecks in the world.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

The remains of the iconic train crash from the movie The Fugitive can still be found rusting along the Great Smoky Railroad.

The decaying remains of a ship whose captain mysteriously disappeared.

Mysterious wreckage of a small plane has been lodged in this tree since at least 1971.

A steamer run aground near Bimini lives a second life as a playground for scuba divers.

WWI hospital ship lost in a cyclone turns up on the coast of Fraser Island, where she remains rusted and forgotten.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

The remains of a Canadian train crash are now mouldering beneath layers of rust and graffiti.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

World War II bunker still standing on the New Jersey beach.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

A sharply wedged sundial marks the point at which each day in the United States begins.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

The highest point in Wisconsin is capped by two towers that are not as mythic as Tolkien's but provide much better views.

The highest point in Oklahoma used to be a lawless outlaw's paradise.

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

The summit Roosevelt conquered before he descended to become The Chief.

Roaming bison and a spectacular view at the highest point in Nebraska.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

The highest point in Mississippi is a hilltop that was once used to bombard a nearby town with artillery.

The highest point in Louisiana, Driskill Mountain at 535 feet above sea level.

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

The highest point in Iowa, while not that impressive to mountain states, has earned its own monuments.