Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

The first permanent memorial to a unique secret weapon of World War II.

Dramatic river bend surrounds a natural red-rocked pedestal.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

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

Designed by Maya Lin, the memorial honors 41 individuals who died fighting for equal rights between 1954 and 1968.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

An extravagant western hotel where every floor is the "ground floor."

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The highest point in Texas is capped by a big silver pyramid.

A spring-fed pool so deep it's used for scuba diving as well as swimming.

A collection of massive stacked rocks in Texas includes a snarky note on the benefits of modern technology.

The petroleum industry brings you the joys of hydrocarbons and largest collection of antique oil rigs in the world.

A modernist landscape of water and sci-fi concrete.

A symbol of Texas pride.

This memorial marks the devastating day that Texas City was destroyed in a daisy chain of exploding ships.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Thirteen pastel palaces in downtown Charleston add a gorgeous splash of color to the city.

Most historians agree that the so-called "Gentleman Pirate" wasn't much of either of those things.

The Lowcountry color with the power to stop evil from entering a home.

A statue honoring 44 continuous years of greeting passing ships.

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