It's not 3-D but for a tour of the ancient sites in Greece - try this one:
http://www.stoa.org/metis/cgi-bin/cat
there's a similar virtual tour of the taj mahal here:
http://www.taj-mahal.net/indexHome.htm
The same group also does Kew gardens, the British Parliament, St Paul's Cathedral - they have a number of sites that you must register to see all of.
http://www.armchair-travel.com/home/index.htm
There's a (somewhat clunky) virtual reconstruction of the Great Kiva from Chetro Ketl with good information here:
http://sipapu.gsu.edu/html/kiva.html
The Globe Theater reconstruction is here:
http://virtual.clemson.edu/caah/Shakespr/VRGLOBE/
There are several Roman virtual reconstructions here:
http://australis.www2.50megs.com/Marcellus/tour1a.HTML
There are lots of others - help us out here folks...