The Panathenaic Stadium in Athens is one of those places that gives a little on first inspection - then, when you prove your commitment a little - paying your €5 and going inside the location, it gives a little more. Climb to the top and your effort is rewarded with every step as you climb above the city streets. Views open up. The light strikes you from every angle. At the top, turn around, and prepare to give an involuntary breathless Wow. You're standing in the centre of a large U shape - the opposite side looks to the far mountains, the source of the marble that's all around. This is the only stadium in the world built entirely of marble. On a sunny day, Raybans are advised.
By any measure the stadium has rewarded your efforts already. But, go with a photographer, as a photographer, prepare to shoot lots - MANY - images. I was lucky to be guided by Vasilis of http://www.photowalksinathens.com/ and once over my feeling of 'where do I start to photograph this ?!', with encouragement I saw the angles, the contrasts, repetitions, the light and shadow, the nod back to deep antiquity. For a photographer it is the mother lode.
With Vasilis :-)