Photo Courtesy Roswell UFO Festival

Aliens are all over at the Roswell UFO Festival.

Roswell, New Mexico
For alien enthusiasts, this is ground zero. During the summer of 1947, a southeastern New Mexico ranch foreman noticed some mysterious debris in a field and reported it to the air force, which announced the recovery of a "flying disk." But the military quickly changed its story and dismissed the findings as a weather balloon. Over the years, witnesses corroborated the initial hunch that it was a UFO and fingered the government in a massive cover-up of a crashed alien spacecraft. This story isn't just relegated to the annals of sci-fi -- modern-day Roswellians take pride in their history and host multiple commemoration festivals every summer. The biggest and most tongue-in-cheek is the Roswell UFO Festival, which features a 10k "alien chase," pet costume contest, light parade, and UFO-themed art show. The city's UFO Museum & Research Center hosts Galaxy Fest, a speaker series featuring researchers, abductees, and celebs like Ray Wise, better known as Twin Peaks' Leland Palmer. And the Roswell 2012 Conference welcomed noted ufologists and hosts tours of the air field where the aliens' bodies were supposedly taken after the crash.

If the truth is out there, the machinery at the Very Large Array should find it.

Area 51, Nevada
This military airfield in southern Nevada has been shrouded in secrecy for a number of conspiracy-based reasons, one of which is its peg as the government's parking spot for the crashed Roswell spaceship. Believers have congregated along the road leading up to the base, and UFO sightings have abounded there, leading the state to officially designate it the Extraterrestrial Highway. The site is remote, but visitors can bunk and dine in the town of Rachel, Nevada, at the aptly named Little A'Le'Inn.

Very Large Array, west of Socorro, New Mexico

If the truth is out there, the machinery at the Very Large Array should find it. Part of the National Radio Astronomy Observatory, the VLA is a field of 27 85-foot-wide antennas that, combined, act as one super-antenna 22 miles in diameter. Although the dishes haven't picked up on any alien flights (as far as we know), they have been used to scout black holes and other spooky space stuff. The site is open daily for self-guided tours, and organized tours leave on first Saturdays.