A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Home to items never before seen by the public.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

Mountain where Jesus was first tempted by the Devil.

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

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

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

According to legend it was a nap taken under this tree that kicked off the California Gold Rush.

Gouged in the mountain to make stage coach access easier through the Fremont Pass.

A bizarre house filled with an astounding array of collections.

Four hundred granite steps were built into this massive rock by the National Park Service.

Sports history, made in the Arroyo Seco.

Dentist's hated concrete colossi are now beloved icons of the community.

This giant temperature attraction created some giant electric bills.

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Quite simply the largest tree in the world (by volume).