There are world records out there for the strangest things, and the "buildings" category is no exception. Of course, you have the standard "tallest building" and "most square feet," but did you know there's competition for the title of "deepest underwater mailbox"? OK, we know that's not a building, exactly, but come on, we just had to include it. How much do you know about the world's structures?

Start Quiz »

Question 1 of 10

### The Burj Khalifa, a skyscraper in Dubai, is the world's tallest building. How tall is it?

2,222 feet (677 meters)

2,717 feet (828 meters)

The Burj is 2,717 feet (828 meters) tall -- that's 163 floors.

4,268 feet (1,301 meters)

Question 2 of 10

### The tallest Lego structure ever built was completed in 2012. Can you hazard a guess as to how tall it is?

69 feet (21 meters)

96 feet (29 meters)

114 feet (35 meters)

Hundreds of children helped build the 114-foot (35-meter) Lego building in Hungary.

Question 3 of 10

### A library in China holds the world record for "highest library." Exactly how high is this library?

757.5 feet (230.9 meters)

Nope, it's not on a mountain somewhere, as one might think. The highest library in the world is on the 60th floor of the JW Marriott Hotel in Shanghai. It's 757.5 feet (230.9 meters) above sea level.

1,757.5 feet (535.7 meters)

7,557 feet (2,303.3 meters)

Question 4 of 10

### The biggest mud building in the world is the Grand Mosque in Djenne, Mali. What are its dimensions?

131 feet by 128 feet (40 by 39 meters)

228 feet by 128 feet (69 by 39 meters)

328 feet by 131 feet (100 by 40 meters)

The Grand Mosque is 328 feet (100 meters) long and 131 feet (40 meters) wide.

Question 5 of 10

### How many square feet comprise the largest commercial building in the world -- the flower auction building in Aalsmeer, the Netherlands?

1.7 million square feet (518,160 square meters)

10.7 million square feet (1 million square meters)

The building is a whopping 10.7 million square feet (1 million square meters) -- almost 186 football fields. We can't even begin to imagine how many flowers that means.

17 million square feet (1.5 million square meters)

Question 6 of 10

### How long is the longest bridge in the world -- the Second Lake Pontchartrain Causeway in Louisiana?

10.24 miles (16.48 kilometers)

16.78 miles (27 kilometers)

23.87 miles (38.41 kilometers)

The Lake Pontchartrain bridge -- which connects the towns of Mandeville and Metairie -- is 23.87 miles (38.41 kilometers) long.

Question 7 of 10

### There is a working postbox resting on the floor of Susami Bay, Japan. How deep underwater is it?

23.8 feet (7 meters)

28.3 feet (9 meters)

33 feet (10 meters)

The postbox is 33 feet (10 meters) underwater. Divers can leave water-resistant postcards there which are collected and delivered every few days.

Question 8 of 10

### How much marble does the heaviest building in the world contain? (If it helps, it's the Palace of the Parliament in Bucharest, Romania.)

3.5 million cubic feet (99,108 cubic meters)

The palace features 3.5 million cubic feet (1 million cubic meters) of marble plus 1.5 billion pounds (700,000 metric tons) of steel and bronze, 7.7 million pounds (3,500 metric tons) of crystal glass and 31.7 cubic feet (900,000 cubic meters) of wood. We have absolutely no idea what that adds up to.

35 million cubic feet (991,089 cubic meters)

350 million cubic feet (9.9 million cubic meters)

Question 9 of 10

### The heaviest building ever moved intact is the Fu Gang building in Guangxi Province, China. It took 11 days to move this building 116.8 feet (35.6 meters). How much does it weigh?

3.33 million pounds (1,510 metric tons)

33.3 million pounds (15,104 metric tons)

The Fu Gang building weighs 33.3 million pounds (15,140.4 metric tons) and is 111 feet (34 meters) tall.

333.3 million pounds (151,046 metric tons)

Question 10 of 10

### The largest palace in the world is the Imperial Palace in Beijing. What are its dimensions?

3,150 feet by 2,460 feet (960 by 750 meters)

The Imperial Palace covers 3,150 feet by 2,460 feet (960 by 750 meters) over 178 acres. Most of it was built in the 18th century.

5,130 feet by 4,260 feet (1,564 by 1,298 meters)

8,726 feet by 5,925 feet (2,660 by 1,806 meters)

SCORE:

**0**NEXT QUESTION »

Follow us

Facebook

YouTube

Twitter

Pinterest