Interactive modern and vintage submarine equipment, World War II relics, and submarine attire.

Location of a reliquary containing bone fragments of 18 saints.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

Eastern zen meets Western grit in these four little trees growing out of a rock on Lake Tahoe’s Nevada shore.

One woman's Viking Castle on Lake Tahoe.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

The ghost town that ended up on Ebay.

The most isolated mailbox in America lets desert travelers record their passing.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

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

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

There aren't too many operational funiculars around, but Pittsburgh has two!

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

This divisive system of turtle tunnels was built to save animals stranded after a highway split a lake in half.