The final remnant of the Arkansas zinc industry is this historically protected ghost town.

An abandoned asylum incorporated into a college campus.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

This museum offers an actual time machine back through Colorado's past.

Old submarine parts have been converted into faux whale fins.

A modern day curiosity cabinet.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

Yo, Adrian!

A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.

Medical history museum featuring a lovely doctor's office from the 1800s.

Historical figures from New York City's Catholic community reside in Midtown.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

A little barn in the middle of the city preserving Hollywood treasures since 1985.

North Central Florida's largest flea market and a weekend roadtripper's dream.

An exotic wildlife habitat right off The Strip.

One of the American Southwest's most extensive collections of Navajo rock art.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

A collection of colorful dinosaurs hidden in an actual rainforest.

The largest source of fossilized insects anywhere.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.