This lake in the Cascades lives up to its name, disappearing down a hole every spring.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

Stay in a room with a view... of the bottom of the ocean.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

An extraordinary mixture of natural beauty and man-made phenomena.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Treehouse motel and treehouse-building school.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

A giant 400-acre preserve in North Florida for displaced wolves.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Moonbows over Kentucky.

A lush green oasis in the middle of Chicago.

Where manatees are the snowbird vacationers in these balmy Florida springs.

Magical-looking cottages that inspired one of the most famous animated films ever.

These eerie outliers of the lightning bug family glow a mysterious blue color.

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

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

This geothermal hot spring hides beneath a slowly growing mineral dome.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

This frequently-photographed waterfall takes only a short hike to visit.