You can find free walking tours in most major cities, and Bogotá is not an exception. Most guides will take you through the historic centre of La Candelaria — the creative hotspot of the city set in the winding cobbled streets. You will learn about colonial houses and baroque churches, Colombia's colonial and indigenous past, striking graffiti and the impact of the Colombian drug trade. The most popular free tour is organised by Gran Colombia Tours, but check the link below to find a tour that fits your interests best.

Christmas Island is one of the world's truly spectacular tropical seabird rookeries. It's not just the number and variety of seabirds or their magnificent splendour that make the island so remarkable, but also their sheer visibility. Around 80,000 seabirds nest here annually, with 23 breeding or resident species. Birds can be seen and heard everywhere on the island, at just about any time of the day. With just a little effort, birdwatchers can easily tick off a full list of residents in a busy week or a more relaxed fortnight. However, the elusive Christmas Island hawk owl keeps many coming back. More than 100 vagrant and migratory bird species have been recorded here, including eight breeding seabird species and one subspecies. The most numerous is the wide-ranging red-footed booby, which nests in colonies in trees in many parts of the coastal shore terraces. You may see the endangered Christmas Island frigatebird soaring above Settlement — it's the world's rarest frigatebird and nests only on the island. The golden form of the white-tailed tropic bird is an endemic subspecies unique to Christmas Island. Known locally as the golden bosun bird, this stunning bird is graceful in flight and has been adopted as the island's fauna emblem.

In the days of the tsars, the people who enjoyed themselves in the Riviera’s casinos until late on Saturday night, were not exactly short of money. They went here, to church though, on Sundays. After the collapse of communism in Eastern Europe, things are much as they were in the old days, but thick wads of dollars now rain down on the Riviera — and the beautifully restored cathedral. Strict dress code applies.