For me, Indian architecture is the best and wonderful.

This is Rani ki Vav (Queen’s stepwell) located at a place where water is really scarce. In olden times, whenever it used to rain, this well used to fill up and then water was taken out by walking into it, that’s the stairs are for in this picture. I couldn’t find the photo which I liked the most on web, so here’s a substitute 
Then this is Rameshwaram Corridor, the largest corridor in the world. I have been there two years back and the corridor and it’s pillars are so breathtaking and it seems almost impossible for modern technology to build it the way people build it centuries ago. The pillars end up lining at a small for when seen from the start of the corridor.
This is a South Indian temple and there are lots like these. There is one monument, whose pillars produce music when hitting by anything, even a finger.
I don’t know much about this one, I just found it beautiful so it’s here for you to see
This one is just adjecent to the corridor, and is called Padmanabhaswamy temple (the name is from a Dravidian language and is indeed difficult to read, even for me). The architecture of this one is just awesome. That isn’t light inside the temple but Sun’s position in morning, afternoon, evening and dusk. The temple is identical from all four directions and hence this view. I stayed at a hotel just in front of this temple, so I got the most out of it.

This is a Sikh temple, popularly known as Golden Temple because of its appearance. The temple is indeed covered in Golden Leaves and was completed in 17th century. The lake around it is holy for Sikhs and they take baths in it. I visited this place in 2017 and I was amazed to see fishes were also inside it. I don’t know which species they were but they were orange in color much like jumbo size Goldfishes

This is the last one and is made of iron. This is a pillar from Qutub Minar at Delhi which was build in 13 or 14th century or so. This pillar has been there ever since and is full of mystery as to why in these 600-700 years, this pillar got never attacked by rust.
There is one more which I would like to share are floating stones. These stones were used in the time of Lord Rama in Ramayan ( a holy book) to make a bridge from Rameshvaram to Lanka by his monkey army so that the Lord can bring his wife, Goddess Sita from the then king of Lanka, Ravana. Two of the stones used in that bridge are still there in South India and they literally float. People claim that after writing Rama’s names on any type of stones, they started floating. The bridge made by them more than 5000 years ago was recently destroyed in a tsunami.