Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

"Where the ducks walk on fish."

Where the oil industry began.

The site of America's first commercial oil well essentially disappeared after the town went bust.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

The oldest landmark of Toronto is a testament to shifting sands.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

The colonial city's social history is reflected in its fanciful door knockers.

The second oldest continuously operating bar in Louisiana.

These unusual houses look like giant boats that washed ashore on a residential street.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

An inconspicuous suburban street corner is the site of San Diego's worst air disaster.

One of the largest trees of its kind in California.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

A brick-paved former section of the historic coast-to-coast highway.

An obelisk commemorating Lincoln's role in connecting the coasts.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.

An Englishman loses his scalp to a Cheyenne warrior and lives to donate it to a library.

These experimental weapons brought World War II to Nebraska as well as 26 other U.S. states.

America's first public mental health facility.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

The rusting hulk of a hand-powered, nearly 160-year-old submarine abandoned in 1869 due to the ravages of decompression sickness.