The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.

The highest bridge in America was built for an almost unnervingly small amount of money.

This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

The deadliest diving spot in the world is also a stunning geological marvel.

A morbid gateway to an Alaska town prides itself on the hunting history it represents.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

This public art piece proves that in Portland even reporting the weather is a thing of whimsy.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

The highest point in Washington state is a volcano covered in glaciers.

The king of U.S. high points towers over every other peak on the continent.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

A man-made island in scenic San Francisco Bay.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Charnel house at the foot of Mount Sinai.

Once the largest windmill outside of Holland, with enormous 114 foot sails.