Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

A historic covered bridge, only one of two remaining in North Carolina.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

Rural churches in the middle of nowhere with religious frescoes by famous artist.

Abandoned railway line circling the city of Paris.

Paris' linguistic guide to the international language of, yes, love.

A haunting collection of the vanished and disappearing natural world.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Tubing through a cave lit with glowworms is a magical underground experience.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

Some of the clearest water anywhere in the world.

One man's dream has turned into this naturally growing chapel made of almost nothing but trees.

A glacier pocked with ice caves and surrounded by rainforests.

Known for the tunnel that leads visitors to the water.

Legend says the only thing buried within this magnificent tomb was a dog.

A little-known ruin with a convoluted history and a fascinating latrine drainage system.

This enchanting natural park is a magical example of a temperate rainforest in Europe.

The fifth-longest natural arch in the world, and the longest outside China.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

Found down a long dirt road, a sacred Mexican cenote and 18th-century hacienda remain hidden.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.