Baviera
Best monthJune to September
WaterSin costa
Cost/day€80–120/day
Length5–7 days
Munich as a base with the Bavarian Alps an hour away by train, and lakes to swim in during summer.
Heads up: Oktoberfest sends accommodation prices soaring; if that's not why you're going, avoid those two weeks.
Plan the trip
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External links. Prices here are indicative — check them before you book.
Also in mountains, with kids, winter
Menorca
June and September · €60–90/day
Costa da Morte
July and August · €45–70/day
Islas Azores
June to September · €55–85/day