This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The romance of early commercial flight still fills this Art Deco destination.

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

Parking garage where Bob Woodward met Watergate source "Deep Throat."

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Elevated freight railway turned wildly successful urban park.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

2300-year-old Roman road connecting the empire.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

A geological mystery on Camelback Mountain.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

Flashy signs from Las Vegas’s past find their final resting place at this unusual graveyard.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

An experimental, automotive replica of Stonehenge.

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