This fully intact Neoclassical-Greek Revival style firehouse operated until 1938.

This historic estate on the east shore of Lake Tahoe was home to an eccentric millionaire (and his pet elephant, Mingo).

The arch that celebrated the completion of the Lincoln and Victory highways.

An eccentric millionaire's personal curio collection includes at least one shrunken head.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

This fortress played a key role in the battle that would ultimately give rise to the Maratha Empire.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

Rock-cut cave complex filled with ancient Buddhist artwork.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

An ancient iron pillar in Delhi that seems to be rustproof.

The only quarter of the Old City not dedicated to a major world religion.

A "miracle" that seems to produce more holy fistfights than holy revelations.

This 19th century train workshop is a treasure trove of railroad history.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

The California capital city once stood 10 feet lower than it does today.

An extensive collection of ancient Egyptian artifacts and mummies.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A miniature city, once ruled by the Queen of the Netherlands.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.