An eight-sided home built during a brief octagon craze in the 1850s.

One street divides a single town that stands in two U.S. states.

This old-fashioned carhop restaurant gave the world the waffle cone.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

Three hundred years of preserved Spanish colonial history in San Antonio.

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.

Largest Roman Catholic church in North America.

The world's first time capsule lies behind a welded steel door in Atlanta.

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

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

A long abandoned hospital building on the outskirts of NYC.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

The site of the earliest colonial settlement in the Bahamas started as a place of religious refuge.

Impressive sink holes fill this untouched old-growth forest in the Bahamas.

Remembering the Alamo with a full-scale replica of the 1836 city.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Elvis's own personal tropical hideaway.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

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

The Grand Canyon of Texas.