On a budget, MIT still earns its price.
Free campus; MIT Museum ~$18
If Harvard is the manicured history lesson a mile away, MIT is its opposite and that contrast is the experience: a working, almost industrial campus with little signage for visitors, where you wander somewhat unguided past Frank Gehry's tumbling, off-kilter Stata Center, the Great Dome, Saarinen's spare brick chapel, and the playful undergrad 'hacks' that turn up on the rooftops. It rewards the design- and science-curious and the excellent MIT Museum (reopened in Kendall Square in 2022) gives a visit a focused anchor. The catch: there's no ivy-and-tour-guide hand-holding, far less conventional prettiness than Harvard, and if you don't care about modern architecture or science it reads as a list of buildings rather than a place.