The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

A true treehouse near Hawai'i Volcanoes National Park.

This Hawaiian cattle ranch acts as a museum devoted to the island cowboys that predate the wild west.

The oldest military monument in the United States.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

A monument celebrating the idea of reaching inaccessible places.

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

"We Seceded Where Others Failed."

The American Home, Re-imagined.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

Look closely and you’ll notice that the color changes a third of the way up the tower.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

The private clubhouse for the members of the Academy of Magical Arts.

The blinking light atop the iconic landmark has been sending secret messages for decades.

Pasadena glamour turned government issue.

A miniature train theme park, free to the public, laying at the base of the Santa Monica Mountains.

Wild West history in Hollywood style.

A huge, bustling local market in Panama City.

This seaside production studio was built to film 'Titanic' and has been the wet set of choice for other Hollywood productions since.

A literally moving statue of stacked metal giants just continually trying (and failing) to find love.

Tower with a double-helix spiral, adorned with letters of the Georgian alphabet.