A lot can change in a decade.

If you’ve perused social media at all lately, then you’ve seen just how much (or how little, if they’re lucky) that’s true for people.

As part of yet another online trend, users on Instagram, Facebook, and Twitter have been posting side-by-side photographs comparing what they looked like 10 years ago versus what they look like today.

Called the “10 Years Challenge” — it has also been dubbed the “How Hard Did Aging Hit You” challenge, among other names — the craze has become almost inescapable, with everyone from your old college roommates to celebrities like Padma Lakshmi getting in on the action.

But people aren’t the only ones who change — and they’re certainly not the only ones sharing about it.

Among those who’ve posted about the challenge are the Cambridge Police, TD Garden, and a promotional account for the Seaport District, all of which showed off the progress they’ve made since roughly 2009.

This, in turn, got the Globe thinking: How has the face of the city transformed in the past 10 years or so?

Here’s a look at a few places that have aged for the better, in Boston’s own version of the “10 Years Challenge.”

Downtown Crossing and the “Filene’s Hole”

Photo Credits: Before David L. Ryan | After Lane Turner

The Longfellow Bridge

Photo Credits: Before David L. Ryan | After David L. Ryan

The Seaport District

Photo Credits: Before Yoon S. Byun | After Lane Turner

The Rose Kennedy Greenway

Photo Credits: Before David L. Ryan | After Lane Turner

Causeway Street

Photo Credits: Before David L. Ryan | After Lane Turner

By: Boston Globe