After a six- year break, Frankfurt’s Skyscraper Festival is back on the horizon. On May 25-26, 18 of the city’s highest buildings will open their doors to visitors.

Entry into any one of the skyscrapers is free, but tickets must be obtained beforehand. Try your luck at getting tickets from the website www.wolkenkratzer-festival.de (German only).

Visitors can order up to four tickets at a time (for example, one ticket for themselves and a ticket for each of three friends), but they must be prepared to provide the full names of the people for whom the tickets are being ordered. Tickets allow entry to just one specific building within a given time frame. Children up to the age of 6 do not need a ticket, but must be accompanied by a parent, and only one child is allowed per ticketed visitor. Visitors must bring along official photo identification. Tickets will be sent by post.

If you miss your chance at one of the 80,000 tickets to be given away, you can still make your way to Frankfurt and enjoy a range of activities, among them Reinhard Kleindl’s slackline walk at a height of over 600 feet, performing artists including Nena of “99 Luftballons” fame, and other entertainment along a 3-mile path leading between the buildings.