A well-known landmark that's withstood the passage of time, don't miss Bhimsen Tower. It's a celebrated attraction for history buffs and regular tourists alike.
You'll have no end of sightseeing choices when staying in Sundhara. Bhimsen Tower is a good place to kick off here, but there are plenty of other worthy attractions to visit. Pashupatinath Temple, Boudhanath and Kathmandu Durbar Square are near the historic construction and will fill in your day nicely.