Seeing Fira from the top of the caldera, and looking down at the Aegean far below, is an even more powerful experience than was looking up at it from the ferry. Most of the small city streets are free of cars and barely wide enough to handle two-way pedestrian traffic. My favorite street, which is narrow enough to be called a path, traces along the edge of the caldera for several kilometers. Homes, restaurants, and hotels line this street, and all have extraordinary views. Fira’s white buildings, brightly painted doors, and overflowing baskets of flowers make this a unique spot.