Taken from the link below, these are great examples of how to get a smashing workout with no/low equipment.
Accumulate 5 minutes in a handstand against a wall, and every time you kick down, do a certain number of air squats (I did sets of 15 squats because I suck at handstands and had to kick down about 300 times)
4 rounds for time:
400-meter treadmill run
20 one-arm 50-lb. dumbbell snatches (alternating arms) 20 front squats with both dumbbells
(I would change the snatches to 30 per round)
In a hotel with six floors, 20 minutes of stair sprints and bunny hopping up the stairs
40-meter treadmill run
15 hang power cleans at 135 lb.
Monkey-bar Cindy in a park at night
100 over-the-bench burpees with 50-lb. dumbbells