One cannot help but stare at this modern marvel. As the most visited site in Germany, the Dom is a true engineering feat. I found myself gazing skyward daily at the two enormous towers on the Dom (dome).
Brave the never-ending spiral staircase to emerge heavenward. The view is like none other. The entire city is outlined with the Rhine intersecting it.
If you are truly out of shape or have some health problems, I don't recommend trying to climb to the top. The stairway is cramped. People are trying to walk down as you are walking up and there isn't that much room.
The outside is crumbling so you'll find several vendors outside selling lottery tickets to help save it. Daily they raffle off prizes in exchange for your money to restore the Dom.
You won't be able to avoid it, so why not explore it. The inside is breathtaking too. Make sure you've got a heavy-duty flash or it'll be a long exposure for those with cameras.
Decorated in the gothic style, the original purpose of the Dom was to house the relics of the Magi which were brought there in 1248. The entire structure wasn't completed until 1880. The Dom is the largest Gothic structure in the world! The life-size Gero Crucifix is believed to be the oldest in existence--some one thousand years.