Hey there! I'm happy to help!
When dealing with coordinates, it is very important to remember that 1 degree is about 60 miles. Also, latitude is North and South while longitude is West and East.
Latitude is based around the Equator, while longitude is based around the Prime Meridian. It is very good to know where these are on a map they are what the coordinates are based around.
It is also very beneficial to remember that the tropic of cancer (which is about at the latitude (North and South) of Mexico, Southern China, etc.) is at 23.5° N, while the tropic of Capricorn (South Africa, Central Australia, Northern Chile) is at 23.5° S.
The arctic and Antarctic circles are both at around 66.5° North and South respectively.
The International Date line (which goes through the center of the Pacific Ocean) is at 180° longitude.
So, since our first coordinate has an S, we know that it is going to be South of the Equator. It is further South than the Tropic of Capricorn since 34° is greater than 23.5°. These structures are going to be about 2040 miles South of the equator (60×34). This is also about halfway between 0 and 66.5 degrees, so it is about in the center of the Southern Hemisphere.
We also see that we are 151° E. This is closer to that International Date Line which goes through the center of the Pacific Ocean, which is a very large ocean. It is about 2000 miles away from it.
If you look at a map, you can see that the Tropic of Capricorn goes through Central Australia. We know that it is South of this tropic by about 660 miles, and it makes sense that it could still be in Australia because Australia is an enormous country. Australia is also very far East from the Prime Meridian in London, so this matches our 151° E coordinate.
This is probably in Southern Australia as it is 660 miles South the center. Most of Australia's population is in the Southern part of Australia, so it makes sense that there could be two structures here. The most notable Australian city is Sydney, so since we are being asked to find two structures just given the coordinates, they are most likely famous and Sydney is the most famous city in this area, this is most likely the location for our city.
What are very famous structures in Sydney? Well, the first one that comes to mind is the Sydney Opera House. Right next to it is the Sydney Harbour Bridge, which is the largest steel bridge in the world with arches. Since these are right next to each other and are two famous structures around these coordinates, these are most likely the two structures.
Have a wonderful day! :D
