Structures

Not reptilian, as you might expect, but rather a ridiculously overpriced, stupidly coloured plastic sandal. A very, very big one. There's not much more to be said about Crocs that hasn't been said already, and yet someone has managed to…

Completely unknown to the Western world until 1812, this is the ancient city of Petra in Jordan. Although nobody knows for sure when people first settled here, the incredible architecture that survives is thought to be at least 2,000 years…

The town of Progreso, Mexico, sits on a limestone shelf that falls away extremely gradually as it gets further out to sea. As a result, when they built a pier to allow cruise ships to dock here, it had to…

Normally considered to be places of fun and pleasure, perhaps the last country you would expect to find the world's largest stadium is in North Korea, one of the most isolated nations on the planet. However with the capacity to…

A star fort or trace italienne is a type of military fortification first introduced in Italy around the mid-fifteenth century. Traditional medieval castles, towers and ring forts had proved extremely vulnerable to increasingly mobile cannons, and star forts were introduced…

Here in Lake Berryessa, California, we find the largest drain hole in the world, affectionally known locally as The Glory Hole. Narrowing from 22 metres diameter to 8.5 metres at its thinnest point, this absolutely enormous funnel is technically the…