Most people today want to visit the Reichstag Dome (the building that looks like the gherkin in London). It is really stunning, and offers a great view. Unless you get dining reservations for the top floor restaurant, you must
get advance reservations to get into the Dome (there is no charge for the reservation).
The website where you are supposed to register for your free registration is:http://www.bundestag.de/htdocs_e/visits/besgrupp/histaust.html
At the bottom on the left side is a button for "online registration," that they want you to use.
However, most people find that, whether you use the german or the english version of the website, and whether you use Internet Explorer or Mozilla as a browser, you can never connect with "Online Reservations." It simply does not work. We finally got reservations for a visit by sending an email explaining the problem of not being able to use the website to: [url]email@example.com[/url]
To get a reservation you should include in your email request the number of persons to be visiting, your full names as they appear on your passports, birthdates, addresses, and the day, date, and time of your requested visit. After about 2 weeks, when I was about to give up and try calling their office, I finally got an email response with the reservation, which we had to take with us when we went to visit (like a ticket). As far as I can determine, this is the only way (except for a restaurant reservation) for an american/foreigner not in a tour group to get access to the dome. I am sure they want all the information for security purposes, since it where the Bundestag meets, and there is such danger of terrorist attacks today.
It was well worth all the trouble to get to climb up inside the dome.