Ferry to Qeshm
Qeshm is the largest island in the Persian Gulf, and lies just off the Iranian mainland, north of the UAE. It's a mildly interesting place, with echoes of the old Persian Gulf cultures which have all but disappeared elsewhere. It's not exactly St Lucia, but it's worth a visit if you have the time.
With a car / bike, you take the ferry from Bandar Pol, which is about 60km west of Bandar Abbas.
the following is for a car. Someone once posted here that a bike is free. I'm not sure if this is still correct though.
Port tax IR10,000
Ferry IR60,000 (each way)
Entrance ticket to Qeshm Island IR25,000
Ferries operate daily, when full. You need to go to the customs office about 500m back on the road from the jetty (east side) with your carnet to get some paperwork. It's free and easy, English is spoken.
The east of the island is developed, as something of a poor man's Dubai, but the western arm is interesting. Some nice landscapes, and very interesting salt caves near Namakdan. Basic supplies are available on the island, but there is a dearth of places to eat (or stay) outside Qeshm. Camping options are unlimited though.