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

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

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

White llama terraces dazzle in Peru's "other Machu Picchu."

Ain't no party like a ghost town party.

The Incas turned this ancient Wari aqueduct into an imposing defensive gate.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

With nearly double the depth of the Grand Canyon, this Peruvian canyon is one of the deepest in the world.

This Peruvian bone silo lined with hanging human skeletons and hundreds of skulls is topped with a remarkable Michelangelo replica.

These ruined Incan mausoleum towers still bear carvings of sacred animals on their blocks.

The Uros people live on floating reed islands in lake Titicaca.

Ancient Peruvian fertility temple or modern money-making hoax? Either way these monoliths still look like penises.

Astronomical observatory above Lake Titicaca.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A terrific purveyor of natural history objects and curios.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A hip bar decorated with walls of golden skulls.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Become a prohibition rebel.