Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

An acoustic anomaly with a mysterious cause.

This unusually circular centenarian barn became a Route 66 icon.

Songwriter Leon Russell transformed this church into a recording studio used by many legendary musicians.

This former mining town was named the most toxic town in America.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

One-of-a-kind museum inside the first Boeing 747-400 ever made.

Every winter, dozens of otherworldly ice structures sprout up from a rigged up artesian well.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

Electrical pylon in the shape of Disney's beloved mouse.

The only place for a truly presidential dram.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

A tiny, unassuming park in Tampa that belongs to the Republic of Cuba.

These former theme park figures have a new lease on life outside a water plant-turned-restaurant.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

A historic covered bridge, only one of two remaining in North Carolina.

An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

The massive machine creates cracking displays of indoor lightning.

Abandoned Coast Artillery fort now serves as graffiti canvas and sightseeing vantage point.