Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

Stones speckled along Harris Avenue reveal hidden nuggets of the past.

Essence of hound's tongue and tincture of bloodroot are just the tip of the herbalist iceberg at this beautiful, impressively-stocked apothecary.

Peruse rare tomes like poetry bound in pearls or books with branches and berries growing out of their spines.

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

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

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

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

A whimsical village of unique treehouses resides in a Washington forest.

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

Moss-covered sculptures fill this small Brazilian gorge.

A memorial to the tens of thousands of Irish who fled to North America during the Great Famine.

These strikingly barren, rolling red hills were caused by bad farming practices.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

Every fall this lake mysteriously drains, like a bathtub with the plug pulled out.

The "Paris of the Prairies" wouldn't be complete without a replica of the iconic landmark.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

A bizarre roadside attraction and the first instance of miniature golf in the world.

In the hometown of the Grand Ole Opry star is a larger-than-life memorial statue made entirely from chicken wire.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A floating museum that was sunk by a flood and left to rot in the tides.

This is not your typical jungle gym.