Rustic natural hot springs in the deciduous rain forest.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

Make your reservation to have coffee with some kitties.

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

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

A walk through the historic city center, under the streets of Seattle.

Stroll through a wonderland of stupendous moss-covered trees.

An abandoned observatory in the middle of the Illinois prairie.

With 8,000 pipes this giant instrument is the most versatile theatre pipe organ ever built.

One of the most powerful computers in the world can be visited by anyone who wants to experience more computing than they can handle.

The dream home of an iconoclastic renaissance man still stands as a monument to his domestically mundane vision.

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

This cemetery is all that remains of a school for "wayward" girls.

A hidden grotto on the grounds of the Kane County Government Center.

Roses and other fascinating flora fill this garden built to commemorate Britain's immortal Bard.

The first and only museum dedicated to stained glass and horology opened outside of Chicago in 2017.

Spanking machines, fake goats, and more devices of humiliation are on display in this museum of fraternal initiation devices.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

This botanical garden outside Chicago boasts an array of more than 300 varieties of lilacs.

You can take a class, browse the library, or visit the lavish lair of an international men's humor society.

The 30,000-volume library is one of the world's most impressive poetry collections.

A small abandoned and abused cemetery that has become a magnet for ghost hunters.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.