This spectacular track has run continuously since 1882.

A replica that won't float away.

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

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

This pebble beach is so beautiful that taking its rocks is against the law.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

35,000 grape hyacinths flow like water down a garden hill.

This sprawling bookstore spans four floors and has more than a million books in stock.

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

Come for the speed, leave in love with the desert.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

This freshwater spring fills with 10,000 gallons of water per minute.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

The world's largest military aircraft cemetery.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

A priceless collection of the Nation's cryptologic history.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

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

One of the world's largest automobile junkyards is a unique landscape of metal and moss.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.