This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

A famous hotel houses an impression collection of mini dioramas and giant doll houses.

A chain of bells connect the California Missions and honor the legend of the "King’s Highway."

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

A nostalgic bibliographic gem.

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

The writer took refuge in this home in Southern France for the last 17 years of his life.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Marie told fortunes from her small stand on the Boardwalk for decades, including to a young Bruce Springsteen who would busk outside her booth.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

The oldest continuously operating fish market in the United States.

The ballpark in "Pigtown" where the Brooklyn Dodgers made their name was replaced with a huge apartment complex.

American involvement in World War I officially ended in 1921 in New Jersey, three years late and thousands of miles from the battlefield.

The historic home still shows the scars from a little run-in with the British in 1813.

Washington's iconic carousel has a nice piece of Civil Rights history.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

This unusual structure may be on its way to becoming a cultural landmark in Toronto.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.