The rococo palace of Frederik VIII (Amalienborg Slotsplads 1, 1257 Copenhagen, Denmark; phone +45 2257 3020) is being renovated and modernized as a residence for Denmark’s Crown Prince Frederik and Crown Princess Mary. It will be open to the public Tuesday-Sunday, Feb. 27-May 30, 2010. Entry, DK40 (near $8).

Built in 1760, the palace was last renovated in 1828. The current renovation restored the exterior to its look before 1828.

The London Sightseeing Pass and the Paris Sightseeing Pass allow free entry to, respectively, over 55 attractions in London (such as Hampton Court Palace and Shakespeare’s Globe Theatre) or 55 in Paris (including the Louvre and a Seine River cruise) plus discounts at selected restaurants and shops or on tours. Avoid long lines by showing your pass at the door.

The London pass costs £39 (near $65) adult or £26 child (five to 15) for one day on up to £89/£62 for a six-day pass. (A 6-day...

Projects Abroad (New York, NY; 888/839-3535) offers two-week learning vacations in 24 countries. There are projects in conservation, archaeology, language classes, coaching children’s sports, medical aid and care giving. While most volunteers are between 18 and 25 years old, projects are open to those 16 through 75.

The cost of the two-week projects runs $2,195-$2,895 and covers accommodation; food; travel and medical insurance, and support from the staff at home and abroad. It does...