Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

The skeletal white beams stand as a monument to religious dissent.

The United States' oldest Episcopal church still in active use.

The elevator hidden in a smokestack on Roosevelt's yacht now serves as a monument to the former president.

This 1830s store is believed to be the site of Harriet Tubman's first stand.

Historic home of America's sweetheart sharpshooter, Annie Oakley.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

A wrecked ship dating back to the American Revolution was only recently discovered off the Delaware coast.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

This museum explores the grim reality of life in the earliest British colonies in America.

This poignant display is now a memorial to these regionally extinct species.

This taxidermy scene brings the struggle for survival in the Indian jungle to a quiet corner of a Manhattan museum.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

A beautiful collection of architectural ornaments rescued from demolished New York City buildings.

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

The romance of early commercial flight still fills this Art Deco destination.

The grave of a champion Thoroughbred hides within the former presidential estate.

This spooky statue sits outside a famous Prague theater.

A bygone village occupation lives on via this quaint public chalkboard.

The ruins of a medieval monastery named after a type of tree.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.