The U.S. Navy's last diesel-electric submarine rests half-submerged in the middle of Portland.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

The seamy, underground secrets of Portland's criminal past.

No two pieces are exactly the same at Portland's hippo-themed hardware store.

Entering this curiosity shop is like stepping into a mad scientist's lab.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

Elvis's own personal tropical hideaway.

Once one of the largest producers of pig iron in the world.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

One of the smallest towns in the United States.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

Pyramid home to an obscure religious group that practices modern mummification.

Incredible sculptures inspired by obscure passages from the Bible.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

A once popular resort—said to be the vacation spot of gangster Al Capone—now remains abandoned in the woods of Arizona.

A motel dedicated to Southwestern nostalgia.

An homage to everyone's favorite prehistoric cartoon family.

There are eight natural springs around town, each with a slightly different taste.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

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

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.