Located just to the north of Daegu (roughly behind the Daegu International Airport), the Bullo Dong Tomb park contains over 200 traditional Korean tombs dating from 37 BC to 935 AD. The best time to visit the tombs is in springtime, when the tumuli are covered in lush carpets of flowers.
Greenwich is a short trip from Central London and allows you to take a break from the city and take in some few hundreds of years of history as well.