One of the best places to visit in April is Santorini, a volcanic island in the Aegean Sea. Since the summer rush is still far off, one can see the island’s famous blue-domed churches and whitewashed houses and enjoy its sunsets in peace. Furthermore, the average temperature is around 17 degrees Celsius, making outdoor activities pleasant.
It is also famous for its unique wine varieties grown on the volcanic soil, and visiting a local winery is an absolute must. Akrotiri and Ancient Thera, the island’s two archaeological sites, are two other places I would recommend.
While you should be ready for rain and the seawater will still be too cold for a swim, pickpockets might take advantage of the crowded streets, the overall safety is high. It should also be mentioned that the island is all that remains of a massive volcano, which created a geological caldera, a view that is especially mesmerizing at Oia when the sun sets and paints the whitewashed town's gold. Consequently, Santorini offers an interesting mix of nature, history, and some of the best wines.