Eons ago, a rushing lava river formed this pristine passage through solid rock.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Bathe in these natural hot springs located high in the Andes Mountains.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

Sleep in a glass pod dangling off a cliff.

Did Inca children also slide down these smooth rocky slopes above Cusco?

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

Reclaimed material from a convent destroyed by cannonfire was used to build parts of this 19th-century cemetery.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

One of the last surviving C-97s sits in a field in front of a Wisconsin inn.

Center filled with hands-on displays served as a tribute to several astronauts with connections to the state.

The museum moved on, but the diorama remain.

A crumbling mountain resort that looks like it was abandoned in an instant.

An easy-to-reach, century-old shipwreck in shallow and crystal clear waters.

Home to over 300 antique cars and motorcycles, including Thomas Edison's Model A.

This mechanical wonder towers above a river in Michigan's capital city.

This 19th-century ghost town offers a stunning view of Lake Michigan and a journey through the region's industrial past.

This Native American cemetery features decades-old spirit house hidden behind pine trees and moss.