This large midwestern cavern features impressive rock formations and an underground waterfall.

San Francisco Bay's ghost town.

Dim sum, served in a grand old theater.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

This collection of Japanese luck idols beckons visitors with over 2,000 waving paws.

Abandoned concert venue legendary for its rock counterculture.

This historic national park is covered in the stunning ruins of red rock pueblos.

Mysterious glowing orbs float through the desert night.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

A common entry point to the Griffith Observatory trail holds its own wonders.

An obscure waterfall that looks like something out of a fantasy novel.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Bad farming practices caused this unnatural natural wonder.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

Prehistoric animals decorate this popular outdoor park.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

Even Henry David Thoreau found this glacial pothole irresistible.

The best Tiki bar in Las Vegas.

Museum dedicated to awful artwork.