Free state-run museum covering fine art, natural history, archaeology and a planetarium, a block from the State House. Open Tuesday-Sunday 9:00 AM-4:45 PM (galleries begin closing ~4:30 PM); closed Mondays, so it's open today. Admission is free; planetarium shows may carry a small fee. Call (609) 292-6464 to confirm today's hours and the planetarium schedule before visiting.

The city's main public library and a dependable indoor spot with its longest hours of the week today — reading rooms, computer and internet access, and rotating programs. Open Monday-Thursday 9:00 AM-8:00 PM, Friday-Saturday 9:00 AM-5:00 PM, closed Sunday. Free to enter. Call (609) 392-7188 to confirm today's hours and any registration-required programs.

A nonprofit downtown visual-arts center with rotating exhibitions, printmaking facilities and education programs. Gallery hours are tied to active exhibitions (listed as Tuesday-Saturday 11:00 AM-6:00 PM during shows), so today is one of its open days when a show is up. Call (609) 394-9436 or check the website to confirm a current exhibition is open before visiting.

Free guided tours of the state capitol run Monday-Friday, with slots typically 10:00 AM-3:00 PM, covering the building's history, art, architecture and legislative process. Reservations are required — call the Tour Office at (609) 847-3150 to book. Confirm current times and availability by phone before you go, since legislative sessions can affect access.

Restored 1758 colonial barracks tied to the 1776 Battle of Trenton, with living-history interpreters and guided tours. Official hours are Wednesday-Saturday 10:00 AM-5:00 PM, so it is closed today (Tuesday) — worth planning for later this week. Call (609) 396-1776 to confirm hours and tour times before you go.

Trenton's city museum in the historic Ellarslie Mansion inside Cadwalader Park, featuring local art, Trenton pottery and city history. Open Thursday-Saturday 12:00-4:00 PM and Sunday 1:00-4:00 PM, so it's closed today (Tuesday) — the park and grounds around it are still open. Call (609) 989-1191 or email info@ellarslie.org to confirm hours and current exhibits ahead of a Thursday-Sunday visit.

Trenton's oldest and largest park (~100 acres) and the only New Jersey park designed by Frederick Law Olmsted Sr., with walking paths, open lawns, and the Ellarslie museum on site. A free, evergreen outdoor option open during daylight hours with no admission, so it's a good pick even on a day when Ellarslie's galleries are closed. Confirm any seasonal hours or event closures with the City of Trenton before visiting.

A flat, mostly natural-surface multi-use towpath for walking, running and biking that runs from Trenton up toward New Brunswick, with several free access and parking points. No entrance fee or permit for day use; open dawn to dusk. Check the state park site for the exact Trenton-area access point and parking before you go.

A Delaware River waterfront restaurant and entertainment venue, generally open Wednesday-Saturday from around noon into the evening, with frequent live music, tribute bands and DJ nights — so it's typically closed today (Tuesday). Call (609) 393-7300 to confirm hours and the live-music lineup before planning a visit later this week.

Trenton's only professional theatre company, staging new and socially engaged plays in the intimate ~100-seat Mill Hill Playhouse. Performances run on a seasonal schedule rather than nightly, so today may or may not have a show. Call the box office at (609) 392-0766 or check the site for the current season and showtimes before planning around it.

A 1,833-seat state-run auditorium hosting concerts, touring productions, comedy and special events. Individual shows are ticketed through platforms like AXS or Ticketmaster rather than a box office, so check the venue's listings for current programming — an event today isn't guaranteed. Call (609) 984-8484 for information.

Trenton's largest indoor venue, hosting concerts, family shows, hockey and other sports downtown. Check the Events & Tickets section of the arena site to see what's scheduled and buy tickets via Ticketmaster; there may or may not be an event on a given Tuesday. Call (609) 656-3200 for box-office information.

The nearest full-size multiplex to downtown Trenton, about 10-15 minutes south in Hamilton, with recliner seating and an RPX large-format screen. Showtimes rotate daily, so check live showtimes and buy tickets on Fandango or the Regal app before heading out. Matinee and evening screenings are typically both available on weekdays.

A full-size AMC at MarketFair mall in Princeton, roughly 15-20 minutes north of Trenton via Route 1, with reclining seats — a good alternate to the Hamilton Regal. Evening showtimes run late on weekdays; confirm the exact schedule and buy tickets on Fandango or AMCTheatres.com. Phone (609) 681-5602.