Rail Europe has a two-for-one deal on Swiss rail passes. Buy a Swiss Saver four-day pass and receive a companion pass free. The pass covers unlimited travel on the Swiss Travel system, including trains, buses and boats, plus free admission to more than 400 museums. With the deal, two passengers pay $254 total, including taxes, for second-class travel and $404 for first class. Book by May 25; travel April 1 to May 31.
INFO 800-622-8600, raileurope.com.