This former mining railroad is one of the best-preserved short lines in North America.

The deepest spring in Missouri.

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

This erect, phallic geological spire wasn't always named so domestically.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

This abandoned prison castle has become an imposing gallery of graffiti art.

The first home of the doomed aviatrix Amelia Earhart.

This Italianate Villa-style castle is pretty to look at, just keep off the private property.

A glimpse into the sacrifices of military members during World War II.

America's smallest town is run by its single citizen/mayor/librarian/bartender.

The crumbling structure is a rare surviving relic of the area's bygone mining industry.

America's largest man-made forest was planted in an effort to bring back the past.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

This memorial site offers scenic views and a peaceful place for reflection.

The scattered debris of a T-33 Canadian naval jet crash from 1963 now stands as a memorial.

The wreck of a B-29 Superfortress now stands as a memorial left in the moors.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

This old-fashioned carhop restaurant gave the world the waffle cone.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

In the late 1990s, a mechanic and fan bought this iconic sportscar back from the dead.

For 150 years one family has been producing the iconic hot sauce on a bayou island made of salt.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

Two World War II aircraft lie within the jungle around this abandoned runway.