Things I've loved (Score 2, Interesting)

The land reclaimation projects in Holland are engineering masterpieces.
I lived about 15m below sea level and used to look up at ships travelling
down the nearest canal. You've got to see the Zuiderzee
and the Rhine delta projects.

The Oresund bridge between Denmark and Sweden is amazing,
completed a couple of years ago it's 16km (~ 9 miles) long.

Back in 1999 I took the train from Amsterdam to Beijing. I went thru Berlin,
Minsk, St. Petersburg, Moscow, along the trans-Sib to Irkutsk
then south to Mongolia and into China. It took three weeks in all with a
couple of days stops along the way. The Russian train stays on Moscow
time the whole way thru. I had train lag getting off! It's the Trans
Mongolian rather than the Trans Siberian and it's more interesting
since you get to go thru Mongolia and end up in China.

In China I went to the Great Wall of China, altho' it is impressive I wasn't
blown away by it. I think I'd heard too much about it already. I only
saw one section, if you followed it for thousands of kilometers then you'd
respect the builders a hell of a lot more....

The Cathederal in Cologne is pretty impressive.
The attention to detail is second to none, even in places no one would
normally look.

and a plug for home, the 5000 year old Megalithic Passage Tomb at
Newgrange in Ireland is awe inspiring. On the morning of
the shortest day of the year, a shaft of light shines thru an opening
over the entrance and fills the chamber inside. It's humbling to
think that people were making those sort of claculations so long ago...