This colorful gate stands as an entrance to the walled city of Old San Juan.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

The world's second largest single-dish radio telescope, once used to contact E.T.

This former sugarcane transport tunnel is now a portal to a lovely beach.

La Cara del Indio honors the Taíno chief who fought bravely against the Spanish invasion of Puerto Rico.

This 20th-century mansion plays a key role in one of Puerto Rico's greatest novels.

Years of neglect and nature took a toll on this 19th-century lighthouse.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

There aren't too many operational funiculars around, but Pittsburgh has two!

It's a pretty creepy lock-up.

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

One of the oldest, tallest, and most haunted lighthouses in America.

Step back in time at this immersive historical village.

A luxuriant botanical garden below sea level.

This grand Spanish-Cuban restaurant has been serving customers for more than a century.

Restored historic buildings, machinery, and a Mediterranean garden tell the story of a vibrant multicultural neighborhood in the heart of Tampa.

Step back into the glory days of Florida's nascent tourism industry at this Gilded Age palace.

Tampa’s most famous native royal comes alive in a duo of arresting bronze statues.

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

A collection of unique outdoor sculptures surounded by the beauty of nature.

A natural gas leak provides a flickering flame beneath a waterfall.

The third version of this tall sailing ship sits, rusted and burnt, in Lake Ontario.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.