An amazing example of Federal-period architecture, truly unique to this region of the state.

Once damaged by Hurricane Agnes, this bridge is now on the National Register of Historic Places.

A well-worn trail through thick woods in northern Montgomery County leads to an old schoolhouse.

This small cemetery remains hidden behind a recreation center.

This memorial honors five journalists who were killed in a mass shooting in 2018, and affirms the importance of the first amendment.

According to local history, this cast-iron canine was nearly melted down for bullets during the Civil War.

George Washington once stopped by this house for dinner.

This bell is one of the last remnants of the lost city of Triadelphia.

A total of 14 men held the title of "president" before George Washington—their historical legacies are enshrined in the lobby of a hotel.

This lovely tree was a thank you gift from the man known as "Public Enemy No.1."

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

The world's oldest continuously operating airport was founded by the Wright Brothers.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

America's first nuclear-powered merchant ship is now a time warp to the atomic age.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

A model home in the Medical Examiner's Office in which grisly death scenes are staged to train forensic investigators.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

A unique marker erected during the 18th century.

A New Jersey state park that was once Napoleon's brother's sprawling estate.

Once considered a marvel of engineering, this 107-mile canal played an integral role in building New York City.

In the 19th century, this canal provided power to mills, machine shops, and other businesses in the area.

A small cave hidden deep within the Jenny Jump State Forest.