Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Four hundred granite steps were built into this massive rock by the National Park Service.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

The world is full of swimming holes, but few compare to Samoa’s idyllic To Sua ocean trench.

Football field-sized microalgae production tanks on the Hawaiian coast create a stunning view from space.

A controversial memorial at the place where Captain Cook met his violent end.

These ancient sacred grounds granted amnesty to those who managed to reach them.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

This black shoreline is made up of exploded lava particles.

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.