This one’s for all the engineers out there or just the folks who like to know how a city really runs.

Located on the site of the original Chestnut Hill Reservoir and pumping station, the Waterworks Museum recounts the story of one of the nation’s earliest metropolitan water systems—and, in the process, tells much about the history of the development of the region.

The museums main attraction is the trio of coal-powered, steam-driven water pumps dating from the 1800s.

It’s all free, though donations are appreciated.

The collection of the museum dates from the late 1840s, when the institution's namesake, a former Harvard medical professor, donated it.

The museum includes approximately 15,000 artifacts and cases, including the skull of Phineas Gage, through which an iron rod shot ... though it didn't kill Gage: He lived another dozen years.

Free to all.

Got STEM? This Massachusetts Institute of Technology science museum includes displays on robotics, so it might be particularly popular with the kids.

Right near the State House and the 54th Massachusetts memorial is this museum housed in an 1804 Federal townhouse that Charles Bulfinch designed.

The museum, named for the townhouse's last owner, who died in 1960 and bequeathed it, depicts life in Beacon Hill in the 19th and early 20th centuries.

Admission is $10 per adult. Kids under 13 get in free.

The museum charts the story of African-Americans in New England from colonial times through the 19th century.

The institution's infrastructure itself includes some pretty historic architecture: The African Meeting House dates from 1806, and remains the oldest standing black church edifice in the United States. Tons of abolitionist history passed through it as a result.

Free to all, but donations appreciated.

The West End Museum is just that: a museum dedicated to Boston's West End.

More specifically, it chronicles the forced transition of the enclave due to so-called urban renewal efforts in the 1950s and 1960s—essentially, it's a big cautionary tale to potentially overzealous city planners.

Plus, it's just got some cool stuff about Boston back in the day, including the roles of various immigrant groups in the mighty city's rise.

Free to all, though donations requested for larger groups.

The two-story structure dates from 1661, and is the oldest house in Boston.

It’s also one of the few examples in the entire United States of post-Medieval, West England country framing. In other words, pretty much an architectural museum in itself.

The house is open for tours the third Sunday of every month through the Dorchester Historical Society, which owns it.

The organization behind this museum has roots stretching back to the 1630s, so it's little surprise that its collection of military memorabilia covers quite a few eras.

And it's not all military, either, with books, plates, tankards, and other objects part of the displays.

The space is directly across from the elevator to the fourth floor of Faneuil Hall and is free to the public on weekdays from 9 a.m. until 3 p.m. Holidays might affect the hours though.

Not surprisingly, the museum dedicated to the Boston Fire Department resides in an old firehouse, this one dating from 1891.

There are all manner of firefighting equipment and vehicles on display as well as historical photos.

Visitors might invariably find a friendly dalmatian to pet and the museum is free (though donations via a boot out front are appreciated).

It might be particularly worth a visit if you’ve got kids in tow.