Panorama exhibition hall in old silent theater with a beautiful backyard garden.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

Its buzzing collection honors vibrator history.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A beautiful geyser under environmental threat.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

A hotel and restaurant serving as the mecca of kitsch.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Mysterious rocks that ring musically when struck.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

The first declared National Monument in the United States.

The United States Capitol's former columns still stand.

A strange house built only at night, with rumored mystic inspiration.

A giant Troll lurks under one of Seattle's oldest bridges.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

Enormous lake at the bottom of a unique cave system.

Towering basalt columns, a creation of fire and ice.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

A walk through the historic city center, under the streets of Seattle.

Site of a former hidden treehouse in New Orleans.

Try not to get slimed in Tribeca.