A mailbox that saved a nature reserve.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

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

The most photographed house in Maine looks good enough to eat.

The oldest bridge in South Carolina may have been designed by the same man who created the Washington Monument.

Meet manatees face-to-face at this zoo for native species.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

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

The pit stop from "The Texas Chainsaw Massacre" now serves beef and pork barbecue, not people.

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

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Free public park and gardens filled with peacocks and peahens.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

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

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This bridge is haunted by the ghost of a distraught mother.

An eccentric inventor's castle home with its own indoor weather system.