Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sloth rehabilitation center in the jungle of Costa Rica.

Perched atop the highest hill in Cartagena, this 17th-century convent offers spectacular views of the city.

The colonial city's social history is reflected in its fanciful door knockers.

An inspired museum dedicated to the patron saint of enslaved people, inside the cloisters where he lived and died.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

The caldera of this mini-volcano has been turned into a naturally heated mud bath.

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

The oldest continuously-operating tavern in Wisconsin used a clever loophole to serve alcohol during Prohibition.

This pebble beach is so beautiful that taking its rocks is against the law.

This freshwater spring fills with 10,000 gallons of water per minute.

Once a home for cows and hay, this barn has been transformed into an event cathedral.

The rusted remains of an ill-fated freighter lie just off the coast of South Manitou Island in Lake Michigan.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

A charming remnant of 19th-century fishing towns sits on Michigan’s Leelanau Peninsula.

Legs Inn provides Polish food, a cornucopia of Native American artwork, wood carvings, and mounted deer heads.

Strange physical sensations and optical contradictions keep visitors coming back for more.

One of the largest crucifixes in the world stands 55 feet tall in a secluded, wooded area of northern Michigan.

A Northwoods sporting competition that shows lumber jacks doing much more than cutting down trees.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Medieval ruins nestled within a breathtaking swath of Spanish nature.