Modern St Isaac's Cathedral is the fourth church built on the same spot over the centuries - previous ones were destroyed due to various reasons. And then came Monferrand with his project, and a golden dome designed by him can now be seen from almost everywhere in the city. At a first glance (as well as second and so on) the cathedral strikes with its hugeness which is not that obvious from a distance. The most exciting part is going up to the colonnade with a classic view on St Petersburg. Be prepared to stand in a long queue, for people from all over the world line here regardless of the weather or day of the week longing to see the fantastic scenery.