The largest underground pedestrian tunnel system in the U.S. mostly caters to the people working in the offices above, but provides a great, air-conditioned way to traverse the city.

This small park features a monumental fountain wall, providing a great photo opportunity in the middle of Houston.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

A small car graveyard sits in the shadow of the famous Cadillac Ranch.

This historic folk art garden contains a nightmare tower that claims to be the world's largest concrete totem pole.

The modest childhood home where the baseball legend and Yankees star learned to hit from both sides of the plate.

This small, independent museum documents the unique culture of Deaf people in the United States.

This rural water utility building houses a tribute to one of the greatest stars of the silent film era.

Thousands of small machines line the shelves of this personal collection which definitely delivers on its name.

Explore the cabin where the famed abolitionist once lived and the site where he fought the Battle of Osawatomie.

This statue is an ode to an iconic roadside advertisement popularized during the 1970s.

This small town bank is very aware of its name thank you very much.

Soak in the soul of Kansas City at the oldest continually-operating jazz club in the country.

This abandoned prison castle has become an imposing gallery of graffiti art.

A remarkably opulent mansion with a tragic history.

This mansion was made famous by its colorful cast of owners and location along the Sante Fe Trail.

A beloved, quirky little fountain featuring a large frog spitting water at a naked boy.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

Curious cave that stays a cool 56 degrees all year long.

Erosion and time have created a naturally-formed water park.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

A grove of colossal man-made flowers built to collect the sun's rays.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.