America's post-nuclear-attack chambers of Congress.

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

This site is home to ancient petroglyphs and pictographs dating back to 6,000 B.C.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

Shipwrecks, ruins, and turtles are all that remain on this haunting Caribbean ghost island.

The Ayo Rock Formations stand out on the island of Aruba as a unique arrangement of giant boulders with interesting crawl spaces to explore.

The remnants of an abandoned, 19th-century gold mill along Aruba's rugged northeastern coast.

This church was transported brick by brick from the ruins of a 16th-century city into Panama City's current historic district.

A park that allows you to get up close and personal with one of the world's largest open volcanic craters.

This wildlife refuge is home to more than 200 species of birds, as well as monkeys, lizards, and other wildlife.

The same water that fills a luxury resort’s pools feeds these free hot springs in the rainforest.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

Where monkeys run wild and the humans are caged.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

A layered tribute to the work of mosaicist Isaiah Zagar.

At 207 feet, one of the world's longest continuous escalators.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

Outsider art meets paleontology at this roadside reptile repository.