Use the system of tunnels to access a variety of shops and restaurants through Houston’s 6-mile underground tunnel system.

• The 609 Main building entrance is located on level B1, underneath the escalator and next to the mail room.
• The tunnels extend and connect 95 city blocks. The tunnels are marked with wayfinding tools as well as color coded maps.
• The tunnel hours are from Monday through Friday, 6:00 AM to 6:30 PM.
• Download the Houston Tunnels App for more information!