Currency exchange services are available at all major DC-area airports; however, banks often offer more favorable rates.
ATMs are widely available throughout the city. Travelers without a Visa, Mastercard, Cirrus, or Maestro card may experience difficulty withdrawing cash.
Check with your home bank in advance to confirm international ATM access and any associated fees.
(OR NOT TO BRING)
Laptop (if at all possible)
A travel adapter
Clothes appropriate for local weather and customs
Personal toiletries (shampoo, etc.) and medicines
(Proof of vaccination/immunity)
SIM cards can be purchased at all three major DC-area Airport Wireless stores. Cards are also sold at stores of major U.S. wireless networks, T-Mobile, AT&T, and Verizon.
The dress code is business casual. Dress comfortably, as the rooms are a bit cool.
There are several smartphone apps that can facilitate travel in Washington, DC
Official Washington, DC Visitors Guide produced by tourism authorities is updated twice yearly and available for free download.
Official National Mall and National Park Service App (iOS, Android) offers walking maps and self-guided tours for essential monuments and sights in downtown Washington.
OpenTable (iOS, Android) is a popular free app to identify nearby restaurants and reserve tables. Users will need to create a free account to make reservations.