A mass grave for victims of one of the city’s worst fires.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

Home to a timed geyser created by complete accident.

A retired oil tanker now offering amazing views of New York City.

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

America's post-nuclear-attack chambers of Congress.

This North Carolina grave is the final resting place of the world's most famous conjoined twins.

Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

An eerily abandoned stone tower is all that remains of a demolished dam on Cape Fear River.

A giant cat slowly prowls the parking lot of Zebulon's car dealerships.

A folk art mecca famous among outsider art fans.

A former Confederate hospital serves as a remembrance of wounded and dead soldiers.

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

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.

The unassuming structure was part of a Major League Baseball stadium.

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 flagship building of an early national restaurant chain is a superb example of terra cotta art.

This preserved wilderness hides the remains of a colonial grain mill used to feed George Washington's troops.

These century-old townhouses contain some of the first car garages built in the United States.

This recently uncovered ad for Lindsay's run at Mayor in 1965 had been hiding for decades underneath a billboard.

This unusual subway stop was originally a real estate office.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.