A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.

Home to the deepest rift anywhere on Earth.

A popular rock that acted as a waymarker for American pioneers.

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

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

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

This mining town boomed in the Atomic Age when uranium was gold, only to be abandoned when the industry collapsed.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

An architect's childhood fantasy treehouse made real.

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.

The first declared National Monument in the United States.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A relic of FDR's brief foray into utopian urban planning.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

These unusual rooms on wheels are holdovers from the 1960s.

One street divides a single town that stands in two U.S. states.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

A ghost town that held steady longer than most, but finally gave up the ghost.

This quiet park's strange sedimentary spires were named after Kodak's color film.