A replica of one of the more than 15,000 civilian lookout towers that lined the U.S. coast during World War II.

A building so large that it has its own weather.

Approximately 65,000 gallons of crystal clear water pour out of this headspring every minute.

Get up close to an F-4 Phantom flown in the Vietnam War at this Florida park.

If you don't look closely, you might mistake this sculpture for just another passenger waiting at the airport.

One of the oldest restaurants in Orlando is a no-frills seafood shack still shucking fresh oysters by the bucket.

Opened in 1976, this monster-sized version of the fast-food franchise is sometimes called the Epic McD.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.

The "Bridge Over the Atlantic" lets you cross the waterway in mere seconds.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

Built in the 16th century, the tower is now in ruins.

A once extravagant mansion, now reduced to ruin.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

An ancient yew tree and holy well nestle beside a remarkable 13th-century church.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

An abandoned, desolate train tunnel that was used during World War II.

A collection of historic buildings in central Birmingham blend seamlessly into the cityscape but have an interesting story to tell.

This is the site of the medieval holy well of St. Chad.

In an arboretum with hundreds of memorials to the fallen, this one might be the most poignant.

An 18th century monument regularly tagged with unsettling graffiti referencing a 1940s unsolved murder.

These centuries old gardens have been restored to their 17th century condition.

Some wattle-and-daub, a Moorish mural, a glacial erratic, and a Giant named Gilbert.