A magnificent waterfall nestled in the heart of the El Yunque National Forest.

This iconic clock tower is the largest in the Philippines.

The largest United States military cemetery overseas.

A Hawaiian stairway to heaven—that you can't climb.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

An ode to one of the first concerts broadcast via satellite.

The current Eureka County Courthouse replaced an all-wooden structure that had previously been an ice-skating rink.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

This railroad magnate's 19th century tower is more than a little bit out of place in the Nevada desert.

This was the first homestead registered after President Abraham Lincoln signed the Homestead Act into law.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

One of the smallest towns in the United States.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

The largest island on the great salt lake is home to curious creatures and strange stories.

The fifth-longest natural arch in the world, and the longest outside China.

Dedicated to the victims of one of the deadliest hurricanes to strike the United States in recorded history.

The highway's southernmost spot is a beloved local attraction.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

This massive swimming pool is the high tech home to the human-powered submarine races.

The site of the climactic scene from the classic horror film is now a historic landmark.

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

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.