Under some of the darkest skies east of the Mississippi, this park invites you to look up into the Milky Way.

Public opinion is still divided on this enormous sculpture in front of Baltimore's Penn Station.

These vibrant row houses are a unique example of Baltimore kitsch.

A charming tour of the umbrella, tin-can, and drinking-straw capital of the world.

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

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

Northern Virginia’s iconic Vietnamese shopping center.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

These unusual rooms on wheels are holdovers from the 1960s.

A fake 1930s-euro-style hotel with an indoor mini golf course.

Home to the organ played at General MacArthur's funeral.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

A former major munitions plant that has been converted into a sprawling art space.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

Rowdy rebels fortified this home during the first popular uprising in United States history.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

The only place for a truly presidential dram.

At 207 feet, one of the world's longest continuous escalators.

An original apothecary from 1792.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.