In 1986, Keith Haring was arrested for painting this anti-drug mural on a Harlem handball court.

The rodent-shaped sidewalk imprint that earned worldwide media attention.

One of the few surviving gates into Old Goa, the former capital of Portuguese India.

The highest peak in Puerto Rico is home to a rare fern that can only be found on six trees at its summit.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

The highest peak in Utah is the hardest to reach, but only if explorers choose the hard way.

The highest point in Texas is capped by a big silver pyramid.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

As state high-points-by-elevation go this spot is one of the lowest, but for years it was also the hardest to climb.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

The highest point in Oklahoma used to be a lawless outlaw's paradise.

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

The highest point in Nevada had to be decided by court order after California tried to claim it as their own.

The first home and studio that belonged to the famous architect.

A memorial to the late U.S. Senator Paul Wellstone, who died at this location, along with seven others, in a plane crash in 2002.

A small token of gratitude from freezing cold journalists who were given a warm haven while covering JFK's inauguration.

The Reagan Peace Garden at Eureka College features a chunk of the Berlin Wall.

Artifacts fill the old headquarters of the hugely influential political movement to ban alcohol in the United States.

Featuring a Loretta Lynn display and a re-created coal mine exhibit.

This garage is frozen in the late 1990s, full of rare and untouched cars and motorcycles.

The oldest house in Lindsborg, Kansas, includes some fascinating inscriptions.

Salina's eye-catching giant mural depicting children at play is painted atop a century-old mill elevator.

This 41,000-acre wetland complex is the largest marsh in the interior of the United States.