A few weeks ago I was in holiday in Mallorca (El Arenal) and took my WSPRLite with me. I'd been thinking about using a balloon to hold up a half wave for the 20m band but didn't see any balloons when I got there so had to rethink.
In the end I used the Snowdonia Radio Company UnUn feeding into the ventilation duct up the side of the hotel, with no idea what the SWR might have been. Some RF did manage to escape though, 106 stations reported me on 14MHz WSPR that week, the furthest being OY1R in the Faroe Islands at over 2500Km away.
I also took my Baofeng handheld to see what other radio activity there was on VHF/UHF. Heard some amateur repeaters in the 70cm band (repeaters over there transmit in the 438-439 MHz range) but they were all digital. For people visiting the island it's a good thing to have digital repeaters that can be linked up.
Repeaters on 438.250 (DMR), 439.200 (D-Star), 438.450 (D-Star). Page with all Spanish 70cm repeaters.
No analogue repeaters or simplex heard at all on the amateur bands, and a lot of activity on other frequencies was DMR.
The FM broadcast band in Mallorca is very busy, with the main broadcast site at Bunyola having 25 different transmitters, and another at Palma with 18. Many transmitters at Bunyola are only 300KHz apart, with a couple at 200KHz spacing!