These crumbling Latvian forts make for some haunting seaside ruins.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

A much more welcome kind of snowbird vacationer, manatees camp out in these springs every winter.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world’s largest coastal brick fortresses.

A local prank turned town icon.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

Each step is a mere four inches tall, said to be measured by the stride of a woman wearing a hobble skirt.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

This historic furnace was once used to produce cannonballs during the Civil War.

An abandoned stretch of highway, deteriorating next to the operational one.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

Through the decades, Black music stars have performed at this historic hub for music and the arts.

A secret greenspace hides atop a Capitol parking garage.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The tunnel under the Capitol Building where Congress takes out its trash.

The only tennis court that falls under the jurisdiction of the central bank.

This taxidermy horse was a Civil War hero.