What is the fine-grained topic of the following text: The weekend included a reception in an ancient lava river, a black tie dinner at one of Reykjavik’s top restaurants, a sightseeing trip to a geyser which included a lesson in geyser cooking, lunch on a glacier reached by monster truck trough a blizzard, a snowmobile expedition and a relaxing morning spent at the Blue Lagoon geothermal spa. Only return the topic.
Weekend activities in Reykjavik