The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Washington's iconic carousel has a nice piece of Civil Rights history.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Home to items never before seen by the public.

America's post-nuclear-attack chambers of Congress.

This historic mansion was built as a symbol of love between a husband and wife.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A quintet of history museums make this Virginia graveyard as much a resting place for funereal history as it is for people.

A "hospital" where people went to be quarantined, die, and be buried in the yard.