Fun fact: The London 2012 Olympics sparked a $12.9 billion boost for the UK economy.
Yeah. It roped in stacks of foreign investment and massively upped Britain's street cred, reports the BBC.
Buuuuut, there's bad news.
The games also cost the government an estimated $11.6 billion. Worth it? Meh...
To give Westminster some credit, officials have done a good job in turning East London's Olympic village into awesome housing and popular venues for sport and music events.
It wasn't always like that, however. For months after the Games, it lie desolate. DERELICT.
And the Olympic landscape scar is still visible for many other countries that have hosted the games.
Let's take a peek inside the abandoned baseball stadium at the Hellenikon Olympic Complex in Athens, pictured on July 16, 2014, a decade after the Games.
Here's the old bobsled track from the 1984 Sarajevo Winter Olympics on Trebević mountain near Sarajevo, Bosnia and Herzegovina.
This is a ski jump from the same Olympics and straight from your nightmares.
Here's the Canoe and Kayak Slalom Centre, which hosted competitions during the Athens 2004 Olympic Games. The only thing it hosts now is the eerie whistle of the wind and broken dreams.
A chair stands in a deserted swimming pool at the Olympic Village in the town of Thrakomakedones, north of Athens. A metaphor for something? Probably.
Artwork on the 2008 Beijing Olympics venue for the beach volleyball tears away, and that makes us sad.
Tourists look through a security fence at the National Stadium, known as the "Bird's Nest," which was the venue for the athletics and the opening and closing ceremonies in Beijing in March.
A sign stands at a deserted field showing where the stadium for the 2008 Olympic Games baseball competition once stood in central Beijing.
The laughter of ghost children probably fills this deserted stadium in Athens.
Yeah, the Olympic legacy lives on all right -- in the creepiest way imaginable.