The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Oldest building in California still in use.

This giant temperature attraction created some giant electric bills.

A massive volcanic plug is now a protected area that hosts a number of bird species.

Quite simply the largest tree in the world (by volume).

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

A spiritual vortex among the red rocks in Sedona.

Lucha Libre (Mexican Wrestling) themed taco shop.

Megachurch turned Catholic church comprised of 10,000 glass panes.

A multimedia experience that chronicles the atrocities of racism.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

The first American department store, and home to the largest operating musical instrument in the world.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

Elevated freight railway turned wildly successful urban park.

The most confusing clock in New York.

Rummage through this sunken ship, but leave your scuba gear at home.

An artist's cute bronze subway sculptures belie his violent artistic past.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

There must be a pun in this haystack somewhere...

One of only two commuter aerial tramways in the United States.

Commemorating the spot where the famous scientist fed his pigeons.