This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

Grandpa Rainbow felt the neighborhood needed some color, so he picked up a paintbrush and went to work.

The quintessential Japanese rock garden has existed for more than 500 years.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Looming communist pillar with a Czech twist.

Geodesic dome luxury retreat in the Scottish Highlands.

Large military radio station without transmitting towers.

Extraordinary sculpture garden created by an eccentric English poet.

Man-made waterfall is the tallest in Mainland China.

Cavernous opening completely encased in Karst limestone.

The Dalai Lama named this New Zealand landscape the "Spiritual Center of the Universe."

Sloth rehabilitation center in the jungle of Costa Rica.

The ancient settlement attracts tourists from all over looking to learn about the Chinese vision of the afterlife.

Living towers made of people that are now recognized by UNESCO.

Only gap in the 30,000-mile span of roads called the Pan-American Highway.

Single runway interrupted by a busy road that cuts across its middle.

A castle perched precariously over the Crimean Sea.

A beautiful bamboo trail tucked in this famous Japanese Shrine.

The 10,000 Torii shrine.

Be a ninja - or just act like one.

Walk behind a 50-meter-high waterfall.

A gargantuan crystal kingdom.