On the southern coast of the Crimean peninsula in Ukraine there's giant cogs! They were left over parts from the world's largest clock, which spanned 600m across the coast and was used by scientists in Mir space station to tell…

Here in Saudi Arabia, there's a large square with a smaller circle inside it. Um... yeah, I really don't know what this place is! It's just outside of a small town, and the square is about 500 metres across, defined…

The bizarre Nazca Lines were created thousands of years ago (between 200BC and 600AD) using simple tools to scrape away the dark pebbles and reveal the light sand underneath. Although they're called the Nazca lines, the famous geoglyphs also feature…

Following on from yesterday's Rio-Antirio Bridge, right at the very end of the Gulf of Corinth is the Corinth Canal, a 6.3 kilometre long canal which technically turned the Peloponnesian peninsula into an island upon its completion in 1893. Although…

Over a seemingly dull field in California we find an unusual sight - a mid-air refuelling of a C-5 Galaxy by a smaller KC-135! Very, very cool. The image ghosting is caused by the way satellite photographs are taken in…

Inspired by some posters I've seen recently advertising a rival mapping service, here's the Rio-Antirio bridge which spans the Gulf of Corinth in Greece, which has the world's longest cable-stayed suspended deck. It was completed in 2004 but is still…