An Australian lake whose pink hue defies scientific explanation.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

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

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

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

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

An acoustic anomaly with a mysterious cause.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The angel of death appears to weep black tears at this grave marker.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

A modernist landscape of water and sci-fi concrete.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

This naturally-sourced hot spring is now home to a clothing-optional resort.

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

A dilapidated dock tells the story of Titanic's missed arrival.

Rainbow-hued local gem in Venice.

Cabaret where the show girls are all androids, and the patrons couldn't be more pleased.

The rocks in this arid basin leave trails of movement behind them.

A beautiful geyser under environmental threat.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.