This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

This grand stone tower was dedicated to a famed American humorist almost by coincidence.

The largest self-built castle in the U.S., six decades in the making.

The highest bridge in America was built for an almost unnervingly small amount of money.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

A museum dedicated to the mysterious cryptid.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

The final resting place of one of the United States's greatest poets.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

Massachusetts memorial to murder victim Elizabeth Short near the spot where she was born.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

The site of one of history's most indelible and horrific tragedies.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

This beloved marketplace mascot poops money and grants good luck.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

Where America's first doomsday cult awaited the end of the world.

America's first serial killer rests in anonymity.

The largest earthwork effigy in the world.

The headquarters of the famous Yale society.

Century-old shop, specializing in Occult products.