Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

A boulder carved into the shape of the cosmonaut's head.

In the mountains of West Virginia is this perfectly preserved Art Deco train station.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

An ancient iron pillar in Delhi that seems to be rustproof.

Celebrate the history of the rich and truly misunderstood relationship between man and pigeon.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

The wing of this deserted Boeing 737 almost touches the Dunkin' Donuts next door.

An eclectic sculpture park rises atop a giant pile of ashes in Sweden.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

An architect transformed this abandoned cement factory into his castle-like workshop.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

A deserted Bedouin village lines the shores of this stunning desert oasis.

The site of the first battle of World War II.

This church carved into the rocks is full of enchanting stone statues.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

The bank's whimsical shape was inspired by a child’s toy.

This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

The graffitied ruins stand hidden within the Pennsylvania woods.

The remains of a centuries-old water system that inspired local legends of secret tunnels.

You can explore the halls of tombs in the abandoned former capital of the Zapotecs.

A science fiction-inspired apartment building designed by a famous Spanish architect.

The ruins of the second of three churches dedicated to the saint in a touristic Scottish town.