A little bit Wonkatania, a little bit pink elephant.

A private collection of massive steel monsters guarding a Texas pipe works.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

A health museum containing a 27’’½-foot intestine.

Old Danish castle immortalized in Shakespeare's Hamlet.

A natural wonder in south Denmark.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

Six beautiful wooden giants are hidden around Copenhagen.

A walkable map of the world, made from soil and stone by one man.

An underwater city for the dead.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A psychedelic labyrinth on the San Francisco bay.

World's largest collection of serial killer artwork and other macabre exhibits.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.

A desert settlement founded and later abandoned by Hawaiian members of the Church of Jesus Christ of Latter-day Saints in Utah's Skull Valley.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

The largest island on the great salt lake is home to curious creatures and strange stories.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

A sculpture for the sun and stars, created by Nancy Holt.