“Ask Washington Parent” is a new Washington Parent series that helps families explore the city and answer kids’ curious questions along the way. From underground tunnels to zoo facts, we break it down so parents feel ready — and maybe even a little cool — explaining it.
Washington, DC, is full of iconic monuments, world-class museums and historic landmarks but what many families don’t realize is that there’s a whole hidden world right beneath their feet. The city’s network of underground tunnels is steeped in history, mystery and function, making them a fascinating topic for curious kids and adults alike. Whether they were built for safety, transportation or even a bit of secrecy, these tunnels have played a vital role in DC’s past and present.
So, what exactly are these tunnels? How did they come to be? And, most importantly, how can your family see or experience them today?
Why Do Underground Tunnels Exist?
The short answer: connection and safety. Many of DC’s tunnels were designed to link important buildings, protect people from the elements and provide secure passage for government officials.
Some of the earliest tunnels date back to the late 1800s and early 1900s, when the city needed ways to move between buildings without disrupting busy streets above. For example, tunnels under Capitol Hill connect congressional office buildings directly to the U.S. Capitol. This allows senators and representatives to travel safely and quickly, even during bad weather or heightened security events.
Over the years, additional tunnels were added for different purposes, like the Metro system, which opened in 1976, giving residents and tourists an underground transit option to avoid DC’s notorious traffic. Some tunnels remain top secret, especially those related to national security, while others are well known and even open to the public.
How can I explain this to my kid?
“Tunnels are like secret hallways under the ground. They help people go from one place to another without getting wet in the rain or stuck in traffic. In Washington, DC, some tunnels let Congress ride little trains under the Capitol, and others are used for the Metro trains that carry families all over the city.”
Famous DC tunnels you can see
While many tunnels in DC are closed to visitors, there are a few places where families can safely experience this hidden underground world.
U.S. Capitol Subway System
One of the most famous tunnel networks is the subway system under the U.S. Capitol. These small trains transport members of Congress and their staff between office buildings and the Capitol itself. While the trains are for official use, families can sometimes catch a glimpse during guided Capitol tours. Kids especially love seeing this behind-the-scenes view of how the government operates.
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- Address: U.S. Capitol Visitor Center, 1st St. SE, Washington, DC
- Hours: 8:30 a.m.-4:30 p.m. Monday-Saturday
- Admission: Free with advanced tour reservation
- Phone: (202) 226-8000
Metro Tunnels
DC’s Metro system is a vast network of underground tunnels stretching across the region. Riding the Metro isn’t just convenient, it’s a fun way for kids to experience life underground while traveling between museums, monuments and neighborhoods. The Smithsonian station, located on the National Mall, is especially popular with families.
Tip: Purchase a SmarTrip card before your visit to make hopping on and off the trains easy and stress-free.
Dupont Underground
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For a truly unique experience, check out Dupont Underground, a repurposed streetcar tunnel beneath Dupont Circle. Once abandoned, it’s now used for art exhibits, performances and special events. Families with older kids will enjoy the chance to explore this creative space and learn about its history.
- Address: 19 Dupont Circle NW, Washington, DC
- Hours: Thursday-Monday closed; 11 a.m.-5 p.m. Friday-Sunday
- Admission: Varies by event, check website for details
Tunnels with a hidden history
Some of DC’s tunnels aren’t accessible to the public, but knowing they exist adds another layer of intrigue to your visit.
- White House Escape Tunnels: Built for security, these tunnels allow the president and staff to evacuate quickly during emergencies. Their exact locations are classified, but they’ve been featured in movies and TV shows.
- National Mall Utility Tunnels: Beneath the National Mall are tunnels used to carry power, water and communications infrastructure to museums and monuments. While unseen, they keep the city running smoothly.
- Prohibition-Era Tunnels: In the 1920s, secret tunnels were rumored to connect speakeasies and private clubs during Prohibition. While many have been sealed off, they remain part of DC’s colorful past.
Tips for exploring DC’s tunnels with kids
While you can’t wander freely through every tunnel, here are some tips for making your underground adventures fun and family-friendly:
- Book tours early: Guided tours of the U.S. Capitol or Dupont Underground can sell out quickly. Reserve tickets online well in advance.
- Make it educational: Bring along fun facts about the tunnels’ history to share with your kids while exploring.
- Ride the Metro off-peak: To avoid crowds, plan Metro rides for mid-morning or mid-afternoon when trains are less busy.
- Pair with above-ground fun: Balance underground adventures with visits to nearby parks, like the National Mall or Franklin Park, to give kids time to run and play.
