What are the symbols when you click on a landmark?

Above the landmark's name, on the left is a symbol of a house with an arrow, meaning upgrade. It is next to the number of upgrades you have completed over the total number of upgrades possible. To the right of that is a symbol of a flower next to the total number of Flowers you have earned from that landmark. The Aviary Landmark has an additional symbol of a bird, next to the number of birds you have completed/released.

Below the landmark's name, there is a red "X" button to exit the landmark. The green button with the house allows you to renovate. But if you have completed all upgrades, the green button will contain an energy bolt, meaning there is energy you can collect. It turns gray if there is no energy to collect.