Maine's only authentic torri gate celebrates a longstanding international relationship that started with the rescue of four sailors.

An optical illusion found amid a logged redwood forest.

As a show of peace, a Japanese naval pilot gifted his 400-year-old Samurai sword to the Oregon town he bombed.

The park preserves a single, rare species of carnivorous plant that spells doom for unsuspecting insects.

There's something big lurking beneath the surface of this tiny Oregon park.

This nature center has one of the largest collections of native raptors in the Pacific Northwest.

With the touch of a button, you can read a randomly selected short story.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

A psychedelic labyrinth on the San Francisco bay.

This whimsical stacked cabin looks like something out of a children's book.

Located more than 600 feet beneath sea level, this tunnel boasts the world's first undersea roundabout.

During World War II, Austria's oldest salt mine was used to store thousands of pieces of stolen artwork.

This massive underground salt mine now holds a sci-fi theme park in its depths.

This colorfully-painted tunnel links two distinct parts of a historic neighborhood.

A massive stone fox oversees a Rotterdam elementary school crosswalk.

A journey through 430 years of bulbiculture in the Netherlands.

It's safe—and permitted—to walk across these twin natural sandstone arches.

Admire a Lilliputian replica of the fast food outlet.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

An eatery for UFO seekers on the Extraterrestrial Highway.

This sign designates the road that leads to the infamous Area 51.

Mysterious meeting place for UFO hunters near Area 51.

The self-proclaimed gateway to the Extraterrestrial Highway.

One of the few remaining indigenous petroglyph sites in Nevada.