With a facade that hasn't changed since 1633, the Rosenborg is the greatest and purest Renaissance structure in Denmark, and has survived both fire and war.

Christian IV conceived of the palace in 1606 but it began with Kongens Have, the King's Garden, which still surrounds the palace today, and is one of the more delightful places in Copenhagen for a stroll. The king liked the place so much he built a summer pavilion here, which eventually led to the creation of this monumental red-brick slot.

It houses everything from narwhal-tusked and ivory coronation chairs to Frederik VII's baby shoes -- all artifacts from the Danish royal family. Officially, its biggest draws are the dazzling crown jewels and regalia, in the basement Treasury, which houses a lavishly decorated coronation saddle from 1596 and other treasures. Try to see the Knights Hall in Room 21, with its coronation seat, three silver lions, and relics from the 1700s. Room 3 was used by founding father Christian IV, who died in this bedroom decorated with Asian lacquer art and a stucco ceiling.