Subway fares will increase on Sunday. Soon after that, L train service will be disrupted on nights and weekends. (And, of course, big dogs in bags will be a fixture in your subway future, too.)

In light of all that, it’s easy to forget that the subway was once grand and majestic: chandeliers and skylights, graceful arches and vaulted ceilings.

There’s one subway station that still has all those glamorous features, and you’re not allowed to explore it — except on a special tour.

Where is the station?

It’s right under City Hall in Lower Manhattan.

It’s technically one stop south of the Brooklyn Bridge-City Hall stop. Southbound No. 6 trains head into the old station, using it as a turnaround to get onto the northbound tracks at Brooklyn Bridge.