Maya Lin's "Ecliptic" outdoor area in Grand Rapids,Michigan features water in its three states: liquid,gas and solid.

VOA: special.2009.05.06

All of the boats had to pass through an area called the White Horse Rapids.

VOA: special.2009.02.11

It provided a calm, safe route west next to the river, which is nearly dry upstream part of the year but whose rapids rage in springtime.

VOA: standard.2010.04.29

Kroenke Sports Enterprises and its U.S. football team, the Colorado Rapids, have a marketing alliance with Arsenal to promote the Gunners in the U.S., including via KSE's TV sports network, and make Arsenal's highly regarded player development expertise available to the Rapids.

FORBES: Gunning for It All

Below the 68ft-tall Cumberland Falls, about 110 miles south of Lexington in Cumberland Falls State Park, there are simple places to practice white water rafting -- most of the rapids are Class II or Class III, and the rapids are well spaced out.

BBC: Adventure travel in eastern Kentucky

The Slovakians in particular excel at slalom, a canoeing event that involves river rapids.

BBC: Cheering on the Olympic underdogs