Of course the grave of JFK's assassin is surrounded by conspiracy theories.

A modernist landscape of water and sci-fi concrete.

The Ryerss mansion in Burholme Park now houses a community library and a museum filled with a trove of oddities from around the world.

Seven people are buried in the middle of what's now a movie theater parking lot.

A mixture of strange symbols, ciphers, words and cryptograms carved in 1876 remain unsolved to this day.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

The damming of the Colorado River buried an iconic geologic formation before record-breaking drought brought it back.

Dramatic river bend surrounds a natural red-rocked pedestal.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

This hidden gem in Arizona is truly worth the rugged journey.

This mesmerizing and surreal landscape features intricate patterns of white and red sandstone.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

This magnificent natural sandstone bridge is one of the largest in the world and is an iconic symbol for Lake Powell.

Most-visited and most-photographed slot canyon in the American Southwest.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

The rodent-shaped sidewalk imprint that earned worldwide media attention.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Quite simply the largest tree in the world (by volume).

This small chapel is built of human bones and decorated with a golden skeleton.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

Perhaps the most spectacular grotto along the Algarve coastline.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

Once used to protect important Roman trade routes.

The city of Manchester quietly unveiled this tribute to a 19th-century massacre.