I also like Frank Lloyd Wright's house called Falling Water. It looks pretty neat with a river flowing through the house.

Does this qualify as a building? I find it fascinating.

The Chrysler Building.

Frank Lloyd Wright’s Guggenheim Museum in Manhattan.

CERN.
Does that count?

I have visited the Gateway Arch:

It may not be very ecological friendly but I still have an admiration of it.

Neuschwanstein Castle in Bavaria, the ancestral home of the Swan King, Ludwig II AKA the Mad King, sponsor of Wagner.

"The Turtle" back home In Niagara Falls, NY. It was the Native American (Haudenosaunee) arts and culture center until it went out of business. I used to go there a lot. I am part Seneca and Mohawk.

the mosque at cadiz spain followed by alhambra , granada

Neuschwanstein because of it's fairy tale quality and Wieskirche. Yes Wieskirche is a church but after seeing so many dank, dark and imposing churches in Europe it was as if a great weight of oppressive expectations was lifted. It is open bright and pretty. It's also important to remember that Mad King Ludvig had Neuschwanstein built as a tribute to and symbol of German nationalism as laid out by Wagner. We all know what happened with that. @Jnei can you post pictures for these please? I have figured out how to do links but can't get the picture to show up.

Every year I go up to DC on a school trip. There are three things I see that I love to see every year and never get tired of them. President Jefferson's home (Monticello), The Jefferson Memorial, and the National Cathedral.

Growing up in the Bay Area I have always dug the Marin County civic center. Designed by Frank Lloyd Wright.

The Cologne Cathedral

I am partial to Gaudi

Flying Saucer....

WOW..so beautiful.

My favorite building is a world favorite also..the Sydney Opera House. I loved seeing it when I was there and kept photographing it from the ferry boats as well.

Here are pics of the opera house in May 2005, one of me in front of it, one of me on the ferry boat with Sydney bridge and opera house in distance.

Old city hall in Richmond, Va, USA. My parents were married there 2 Feb, 1949. It now belongs to Virginia Commonwealth University.

To begin: Saint Basil's cathedral, Russia for the decorative spires. [en.wikipedia.org]

Also, the Ugly House, more correctly known as Tŷ Hyll, in Capel Curig, Wales - the English name comes from the stream flowing past it, the Llugwy. Nobody knows how old it is, nor who built it.

Another one of mine, Le Corbusier's Villa Savoye. In Canberra, Australia, the Villa has a "shadow" - it's identical in every way, except it's black.

There are some huge shaped rocks somewhere weighing up to 5 tons I think that are so well shaped you can't get a human hair between them of different sizes made long before machines where hade that are mind-boggling and there's a temple or something in Asia that's been half taken over by strangler figs etc that's amazing.

My home after trees came tumbling down during a storm.

Whoa, interior photos are really cool too. Love it.

Off the top of my head I love this freaky hermit's heaven house in California, think I read somewhere someone high up in Facebook bought it not long ago, the Doolittle house.

[google.com]:

There are a few and they're all to do with the ancients. I chose the Museum Of Antiquities in Cairo because it symbolised a journey for me, academically as well geographically, and I just love to see and touch the ancients.