• Rome2Rio » Provides full directions from any two places from door to door including trains, busses and ferries.

 

  • Atlas Obscura » Find hidden places in a city you want to visit.

 

  • FlightRadar24.com (not free)
  • ADS-B Exchange » Offers most of the same functions, without the paywall. It also includes military aircraft, which FlightRadar24 filters out. An available Chrome extension adds functionality when visiting the ADSB site.