Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The oldest farmer's market in America is so ancient it was approved by the King of England.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

This downtown Dallas art installation is always on the lookout.

The highest point in Washington state is a volcano covered in glaciers.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A bit of retro transportation flair preserved in the world's largest department store.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

This float factory takes the mask off of Mardi Gras and lets visitors see where the magic happens.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Walk the whole Mississippi River!

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

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

148 feet long and in the middle of a verdant forest.

A wall of chewing gum moonlights as collective art.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.