Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

This massive redwood tree has a hole in the base big enough to drive through.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

Bonsai garden in Oakland is curated by the first non-Japanese female bonsai master in the United States.

An idle pastime becomes a record holder in Boys Town, Nebraska.

Nature’s skyscraper launches out of the terrain with attitude.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

The most isolated mailbox in America lets desert travelers record their passing.

Mysterious meeting place for UFO hunters near Area 51.

Display that gathers the basic elements of the universe in one convenient location.

An extraordinary mixture of natural beauty and man-made phenomena.

A tunnel dug through the side of a mountain by hand provides convenient yet death-defying access to a small village in China.

The largest toy museum in Poland showcases Europe's history of childhood.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

Model Trains and Much More in Hamburg.

A giant donut stands as a popular symbol of Los Angeles iconography.

Explore nearly 400 years of English middle-class home life.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This massive subterranean fissure is known as the "underground Grand Canyon."

The sign at the garden gate reads: "These Plants Can Kill."

This is not your typical jungle gym.

A spring-fed pool so deep it's used for scuba diving as well as swimming.