A tiny replica of the iconic London landmark hides on the side of the steel structure.

Behind one of the world's most impenetrable vaults is a massive collection of retail silver.

England's most famous front door has an accidental doppelganger.

The pockmarks across the building's facade are remnants of the Blitz.

This London marker celebrates the spot where the world-famous English band was founded.

A hidden path at the National Theatre lets you look behind the scenes of the latest productions.

It celebrates a very stinky task and salutes London's fatberg-vanquishing team.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

Rather than a run-of-the-mill franchise hotel, this lodging has been decked out in dinosaur decor.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

The childhood home of Henry Jones Jr. is now an adventure-themed bed and breakfast.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The highest bridge in America was built for an almost unnervingly small amount of money.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

When ecosystems collide in the arid Southwest.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

The largest self-built castle in the U.S., six decades in the making.

An innovative local park built from an abandoned sewage treatment plant.