Now nearly abandoned, Kaskaskia was once the capital of Illinois and one of the most important towns on the upper Mississippi.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

The evocative ruins of a 1,000-year-old hill fort lie within a popular tiger reserve.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

One of Japan's most famous sights, the bridge was originally built in 1673.

The spot where the namesake of the Douglas fir met his mysterious end on a Hawaiian volcano.

These ancient sacred grounds granted amnesty to those who managed to reach them.

A small Montana town commemorates the dog who waited at the train station every day for his owner to return.

One of the oldest Catholic churches in the U.S., situated just east of Gettysburg.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

An abandoned stretch of highway, deteriorating next to the operational one.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

The rogue roots are gradually consuming some of the historic marble grave markers.

Built by the patriotic residents of Boonsboro in a single day.

A collection of huge Pre-Colombian structures in Alabama.

Four ionic columns from the Treasury Department building ended up in a park in Nebraska.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

This playground sculpture of an icon from the past is dedicated to the children of the future.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

The walls of the iconic dome are hollow and have a secret stairway.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

This family driveway also serves as the highest point in Illinois.