Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

Illegal drag racing two stories beneath Chicago’s streets.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A small poultry graveyard in the courtyard of a popular Key West watering hole.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

One of the oldest Catholic churches in the U.S., situated just east of Gettysburg.

Could it have picked a better place to land?

Priceless space junk on display in front of a local Dairy Queen.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

Yo, Adrian!

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

This historic Pittsburgh tennis complex is a rare example of natural red clay courts.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

Steepest flood safety railway in the entire world.