A carved bench marks the Scottish cave that inspired the classic adventure novel "Treasure Island."

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

One of the foremost Sherlock Holmes collections is hidden away at a Toronto library.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

This uninhabited island in Maine is home to various works of art left by visitors over the years.

The centuries-old obelisk may have inspired J. R. R. Tolkien.

Rare recess caves fill this unbelievably beautiful Ohio park.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

An unassuming nature trail winds through dozens of tiny houses built for the wee people.

This charming pup is meant to celebrate the youth and stubbornness of the city's students.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

This professional clown's home is an outsider art wonderland.

The Ozarks' strangest dwelling.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

This Birnam-based garden honors the legacy of 19th-century children’s book author Beatrix Potter.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

A small poultry graveyard in the courtyard of a popular Key West watering hole.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

This quaint stretch of road is the final resting place for hundreds of America's four-legged veterans.

A whimsical folk art garden full of punny pieces and a diorama containing 3,500 toys.

A soon-to-be-forgotten roadside spectacle loaded with local lore.

An exhibit of items from the mental institution where Mary Todd Lincoln lived after her son conspired to have her committed.