A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

Commonly acknowledged as the only public monument to the Devil himself.

A tunnel of hardened lava along Maui’s famous Road to Hana.

A Serbian church lit by chandeliers made of weapons.

One of the world's largest salt caves is filled with fragile salt sculptures, salt rivers, and huge salt megadomes.

The magic's in the hole!

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

1,001 carved statues of the Buddhist God of Mercy, each with a unique face.

A museum commemorating the Donora Smog, which killed 20 people in October 1948 and sparked national outrage over air pollution.

Lone survivor from Custer's Last Stand forever preserved.

This zoological museum began as the first great curiosity cabinet.

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

A 200-year-old collection of oddities and medical paraphernalia.

Once home to over 8,000 exiled Hawaiians suffering from Hansen's Disease.

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

A "miracle" that seems to produce more holy fistfights than holy revelations.

Abandoned substation turned village treasure.

A white Buddhist temple with a golden restroom.

The farthest you can be in the contiguous U.S. from a McDonald's location.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

Various forms of phallic art decorate this hill in commemoration of legendary local tragedy.

A science teacher's dream.

One of the world's most complex timepieces.