Flip your own pancakes in this old sugar mill within a Florida state park.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

A monument celebrating the idea of reaching inaccessible places.

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

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

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

The world's longest continuously running show has played at this small West End theater since 1974.

A naturally mummified 2,000-year-old man.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

Collection dedicated to brands, packaging and advertising.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Scattered throughout London are ancient remnants of the city's former bounding wall.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

A hidden three-foot-wide house separates these two regal churches.

Elaborate tile work in this railway station tells the story of Portugal.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Eat the ultimate iteration of Portugal's most beloved pastry.