Around 20 minutes down the road from Solden is the "Aqua Dome" located in the village of Langenfeld.
After a few days on the piste (of both varieties!) you may well be ready for this place..
The spa area contains a couple of nice (warm) indoor pools as well as large outdoor pools you can swim out to. As well as this there is a sauna area which also has dunking pools but I should add this area seems to be nude only (a shock to us Brits but an everyday occurrence for our continental European friends).
To get here you can use the "Ski Bus" to and from Solden (free) or the standard Austrian "Postbus" connects both resorts.
There is great hiking in the whole valley, from Oetz up to Vent.
Many off the hikes described in hiking guides are roundtrip hikes, so you can drive up to the start and you will end up there again in a few hours.
You can hike through little villages, or just do mountain hikes, your choice, your adventure.
Solden is the piste kapital in Otztal Tirol. But there are more places with good slopes which are mostly less crowded than the Solden ones.
Oetz, langefeld and others have good slopes, and there is a free skibus which will take you there. So if you feel like hitting the slopes, but don't want the crowdes, just go to one of the other slopes.