One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

This building at the south end of the boardwalk was once home to the U.S. Life-Saving Service and the U.S. Coast Guard before being rescued itself.

World War II-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers.

The Dover International Speedway is home to a towering, concrete-skinned, racecar-hungry behemoth.

Storage warehouse of the rich and famous.

A huge railroad museum with over 100 pieces of rolling stock focusing on the railroad history of Pennsylvania.

This vintage short line in Amish country runs passenger steam train excursions and still hauls freight.

Wading through a small lagoon reveals a secret, wild stretch of pristine beach.

A community of collapsing homes more than a mile out from the Florida coast.

The return of something once considered a basic part of life.

A 12th-century church that houses a dark creature.

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

Named after a Mexican president, who once lived nearby, this park in a residential Mexico City neighborhood packs a whole lot of history into a small space.

Once named the “world’s oldest gas station” due to its unusual construction material.

Designed by an artist known for his eccentric, satirical public works of art.

The meeting of the northwestern corner of Delaware, the northeastern corner of Maryland, and the southern edge of Pennsylvania.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

This school was designed to support the rebuilding of African American schools around Delaware.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

The only subway station in the city that still makes use of gap fillers.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

An homage to Jackie Gleason's bus-driving character from 'The Honeymooners.'

Public opinion is still divided on this enormous sculpture in front of Baltimore's Penn Station.

Try not to get slimed in Tribeca.