A hotly contested micro-nation off the coast of Montserrat.

A city continually buried under the ash of a volcano that has been erupting for more than 15 years.

Quite simply the largest tree in the world (by volume).

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

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Memorial built in 1922 in remembrance of WWI casualties.

Step inside Lucy, the world's largest "elephant."

Thousands of turbines whir at the origin of North American wind power.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A vertically floating hemlock controls the waves and weather at Crater Lake.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

Limestone caves with spectacular showcase chambers.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

A building so large that it has its own weather.

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

The smallest post office in the United States is no bigger than a broom closet.

This spiny beast guards an artist's village while vying for the title of largest lobster in the world.

A mysterious castle built as a monument to lost love.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A sharply wedged sundial marks the point at which each day in the United States begins.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.