Tiny observatory made big contributions to the study of the Earth's motion.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

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

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

Largest Roman Catholic church in North America.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

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

Once America's tallest structure, now a Baltimore landmark.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

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

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

A priceless collection of the Nation's cryptologic history.

Ship skeletons haunt Baltimore's waterways.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

A Maryland museum dedicated to Black history, housed in a historic church.

Held in an old church, this clockwork museum maintains a special focus on titanic tower timepieces.

A graveyard and memorial chapel for victims of leprosy.

At this exhibit on the world of poison, venomous animals steal the show.

A collection of 4,000 thimbles that's more versatile than one might imagine.

A beautiful collection of taxidermy birds and rare pomological wax models.

The name doubles as an appropriate adjective for this small ossuary.

The amazing wonder cabinets of a very rich Austrian archbishop.

The patron saint of spinsters grasps a container of dried blood.