The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

Nobles would stage mock naval battles on this large lake at the Royal Palace of Caserta.

Pompeii's less famous neighbor is still revealing her secrets.

The mayor made the declaration in 2004.

This oddity shop contains everything from antique tools to a human skeleton.

It was once used as a classroom to teach mining skills to local high school students.

Oldest building in California still in use.

Chewing gum tycoon's memorial lies perched over wife's botanical gardens on Santa Catalina Island.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

This museum remembers the tough Mormon trek across America through an intriguing array of artifacts.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

This museum is a full-size replica of an original church constructed during the 13th-century.

A cemetery housing wild west legends in South Dakota.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

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

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

A fitting attraction for the corn capital of the world.

Home with Gothic windows featured in a famous painting.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.