The UK's most prestigious award for architecture, the Riba Stirling Prize, will be decided by a panel of experts later this week.
Of the six shortlisted buildings, three are here in London.
Ahead of the announcement on Thursday 16th, we're finding out what makes the capital's top trio so special.
1. The Shard.
2. Olympic Aquatics Centre, originally the centerpiece of the 2012 Olympic Park, designed to look like smooth running water. It is now a public swimming pool and it's Tom Daley’s new training ground.
3. Last but not least is the London School of Economics's Saw Swee Hock Student Centre.