Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

The world's largest wooden structure.

The first declared National Monument in the United States.

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

Abandoned Nazi train station turned underground astroparticle laboratory.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

A landscape decorated with enormous skull sculptures.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

A small house in Tazones, completely covered in shells.

Houses are tucked between, on, and underneath giant boulders.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.