A mysterious castle built as a monument to lost love.

A monument celebrating the idea of reaching inaccessible places.

A bizarre roadside attraction and the first instance of miniature golf in the world.

This replica of the Greek structure is in the heart of Nashville.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

You thought Santa Claus didn't exist, but it turns out you were wrong.

Symbolic attempt to overcome the issues of life.

The home used in just a few seconds of film that came to define the setting of a hit sitcom.

A massive sea stack famous for its appearance in The Goonies.

Home of Howard Hughes' Spruce Goose.

Only known mainland rookery of the threatened Stellar sea lion.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A volcanic landmark located on an Ice age lake bed.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.