Stunning Roman aqueduct used for 1900 years and still standing.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Holding the most bodies of any cemetery in the United States.

100 massive sculptures in the Hudson River Valley.

A piece of outsider public art accompanied by a strange urban legend.

A trash dump made beautiful by nature's power.

The largest freshwater lake in the Florida Keys.

Three columns of volcanic rock shoot out of the ocean.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

Historic Hull Street was actually the first street with a proper name in the Boston area.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

A monument celebrating the idea of reaching inaccessible places.

San Francisco's first World's Fair, dedicated to the wonders of California.

Once the site of speeding horses, now home to picnickers and public concerts.

Exact replica of the ancient monument, but much, much lighter.

A massive sea stack famous for its appearance in The Goonies.

One of the largest public housing complexes in New York once visited by Eleanor Roosevelt.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

27-room home built with the fortune of a sugar magnate.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

At 207 feet, one of the world's longest continuous escalators.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

This turn of the century masterpiece has a mysterious goaty interloper.